ParGram

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113 discussions

[XLE] Problem with print-feature-forest?
by Katarzyna Krasnowska 03 Mar '14

03 Mar '14

Dear All, I have a question concerning the print-feature-forest command of XLE and would appreciate any help from someone who has some experience using this command. I am working on training a probabilistic variant of the Polish LFG grammar using XLE's functionalities. When preparing the feature forests for cometc using the print-feature-forest command, I came across a problem: it seems that print-feature-forest sometimes gets the feature counts wrong. I ran the print-feature-forest command on the obj-ex.pl file attached to this e-mail, with a features file containing only one line, "fs_attrs OBJ" (so the only feature counted here is the number of OBJ's in the f-structure). obj-ex.pl is a packed parse representation produced by the Polish LFG grammar, with some attributes non-relevant to the problem, such as morphosyntactic ones, removed. The sentence translates as "Look ahead of you and read in the beard". It contains 2 verbs and 2 adjunct prepositional phrases and has 3 possible parses; in two parses, each verb has one of the PP's attached to it; in one parse, the second PP is shared between the verbs. Since a PP which is an adjunct is represented as an f-structure headed by the preposition whose OBJ is the noun's f-structure, it seems that the first two parses contain 2 OBJ's and the third one contains 3 of them since the shared PP appears twice in the f-structure. However, the output feature-forest is: (7 1:2 {1 (1 {2 (3 ) (4 1:2 ) } ) (2 ) } ) which corresponds to two parses with 2 OBJ's and one with 4 of them. Knowing from my previous experience that subsumption can be tricky in XLE, I replaced the two subsume statements in obj-ex.pl with equalities (in the case of this sentence, there actually is an equality), and the feature forest produced for the modified f-structure seems correct: (7 1:1 {1 (1 {2 (3 1:1 ) (4 1:2 ) } ) (2 1:1 ) } ) Perhaps someone knows why it works like this? Am I wrong in expecting what the feature forest should look like? Or maybe it is an known issue with print-feature-forest? I would be very grateful for any advice, since data preparation for my experiments relies heavily on the print-feature-forestcommand . Many thanks in advance, Katarzyna Krasnowska _______________________________________________ XLE mailing list XLE(a)mailman.uni-konstanz.de https://mailman.uni-konstanz.de/mailman/listinfo/xle

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ParGram Sentences Reminder
by Sebastian Sulger 19 Feb '14

19 Feb '14

Hi, We would like to remind all of you to consider parsing the new set of ParGram sentences. Even if you cannot come to the Spring ParGram meeting, it would still be great if you could continue to support ParGram and ParGramBank by submitting your parses. The submission procedure is easy: - translate the sentences to your language; - gloss them and put them in a LaTeX file (use the attached Debrecen handout as a guideline; use the Leipzig Glossing Rules); - parse them; - (opt. disambiguate them); - save the c- and f-structures to eps files; - send the eps files as well as the LaTeX file to me. The plan is to add the sentences to ParGramBank (accessible on INESS: http://iness.uib.no/iness/main-page) after the meeting, i.e. after we have ensured parallelism. Miriam also provided the following notes on the sentences: ---------------------------------- "Also note that the sentences cover three things: 1) Negation -- this was decided on at the last meeting in Debrecen and Gyuri has kindly provided the sentences. 2) Possession --- this is something Jani is interested in and he provided the sentences. 3) The first four sentences of "The Gruffalo". A must read for anybody above 2 years of age. For categories 1 and 2 -- let us know if you have trouble translating them into your language. One of the issues with ParGramBank is that we need to have sentences that are comparable and there are some tough issues about what it means to be comparable (also discussed at the last meeting in Debrecen). We presumably cannot always ensure full comparability, but we can try to make sure that we aren't introducing silly extras that make things non-parallel and that could have been avoided." ---------------------------------- I'm sure that ParGramBank has the potential to grow and provide enough potential for a lot of further research into cross-linguistic treebanking (see, for example, the email by Lori Levin the other day). Best, Jani -- Sebastian Sulger FB Sprachwissenschaft Universität Konstanz http://ling.uni-konstanz.de/pages/home/sulger

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February Pargram meeting
by Kaplan, Ronald 10 Feb '14

10 Feb '14

Hi everyone, As indicated earlier, we will be hosting the meeting at Nuance in Sunnyvale, February 24-28. If you want to look up the location on a map, the address is 1198 E. Arques Avenue, at the intersection of Lawrence Expressway and Central Expressway. The nearest train station is the Lawrence station, about a 10 minute walk. It is now time to develop the schedule. Following tradition, our tentative proposal is to allocate blocks of time roughly as follows: Monday: Feature committee and parse comparison (Jani has sent out the sentences) Tuesday morning: Grammar reports Tuesday afternoon: General session (proposal: a tutorial/discussion on grammar debugging in XLE) Wednesday morning: Papers/discussion Wednesday afternoon: Symposium at CSLI/Stanford celebrating Pargram’s 20th anniversary Thursday: Papers/discussion Friday morning: Planning and wish list, especially about the new arrangements for XLE distribution and maintenance. Please let us know whether you plan to come (for local logistics), and also let us know whether you would like to present a paper, suggestion a topic for discussion, or organize a more focused workshop session. Best, Annie and Ron

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semantic roles for LFG grammar engineering
by Adam Przepiorkowski 03 Feb '14

03 Feb '14

Dear All, [Apologies for cross-posting.] In the context of enriching the Polish LFG grammar with semantic representation, we are looking for a set of semantic roles (Agent, Patient, Beneficiary, etc.) that could be used to mark arguments (and possibly adjuncts) of verbs and other predicates. This set should be exhaustive in the sense that it should be possible to assign – more or less deterministically – a semantic role to any argument (and possibly adjunct) of any predicate. For this reason the standard – in LFG textbooks – sets of some 7 semantic roles do not seem sufficient. Instead, we are looking at larger repertoires proposed in VerbNet, in FrameNet and in John W. Sowa's work on Knowledge Representation. We don't have any strong views about any particular set of semantic roles, as long as it is exhaustive and applicable to real texts (as opposed to being merely theoretically interesting). Has anybody in the LFG community faced a similar task? If so, what set of semantic roles would you recommend? At the moment, we are wavering between VerbNet and Sowa's system, both being more manageable than numerous roles offered in FrameNet, but we are open to other solutions. Many thanks, best regards, Adam P. -- Adam Przepiórkowski ˈadam ˌpʃɛpjurˈkɔfskʲi http://clip.ipipan.waw.pl/ ____ Computational Linguistics in Poland http://jlm.ipipan.waw.pl/ ___________ Journal of Language Modelling http://zil.ipipan.waw.pl/ ____________ Linguistic Engineering Group http://nkjp.pl/ _________________________ National Corpus of Polish

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ParGram sentences for upcoming meeting
by Sebastian Sulger 23 Jan '14

23 Jan '14

Hi, I attach the ParGram sentences for the upcoming ParGram meeting. If you would like to take part in the structure comparison, you should do the following: - translate the sentences to your language; - gloss them and put them in a LaTeX file (use the attached Debrecen handout as a guideline; use the Leipzig Glossing Rules); - parse them; - (opt. disambiguate them); - save the c- and f-structures to eps files; - send the eps files as well as the LaTeX file to me. I volunteer to compile the handout for the meeting. We will not have enough time to look at all 50 sentences in detail, so you are welcome to suggest sentences we can focus on. The plan is to add the sentences to the ParGram Parallel Treebank (accessible on INESS: http://iness.uib.no/iness/main-page) after the meeting, i.e. after we have ensured parallelism. Please let us know Best, Jani -- Sebastian Sulger FB Sprachwissenschaft Universität Konstanz http://ling.uni-konstanz.de/pages/home/sulger

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Fwd: fs_auntsubattr
by Adam Przepiórkowski 25 Nov '13

25 Nov '13

Dear All, [This has also been sent to the XLE mailing list – sorry for cross-posting.] We are currently performing some experiments with training probablistic weights for a Polish LFG grammar using cometc. We are considering possible uses of the fs_auntsubattrs feature template. It is clear that trying all combinations of the grammar's attributes as the feature's arguments makes no sense, so we are trying to come up with some linguistically motivated choices. We thought that it would be useful for us to see how this feature is used in other probabilistic LFG grammars. We would be very grateful for some examples of fs_auntsubattr features which proved efficient in stochastic disambiguation. Many thanks in advance, Katarzyna Krasnowska Adam Przepiórkowski -- Adam Przepiórkowski ˈadam ˌpʃɛpjurˈkɔfskʲi http://clip.ipipan.waw.pl/ ____ Computational Linguistics in Poland http://jlm.ipipan.waw.pl/ ___________ Journal of Language Modelling http://zil.ipipan.waw.pl/ ____________ Linguistic Engineering Group http://nkjp.pl/ _________________________ National Corpus of Polish

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Spring Pargram meeting: February 24-28 at Nuance/California
by Kaplan, Ronald 28 Oct '13

28 Oct '13

Hi everyone, I am happy to announce that the Spring Pargram meeting will be hosted during the week of February 24-28 by the Nuance Natural Language and Artificial Intelligence lab, in Sunnyvale. This meeting marks the 20th anniversary of Pargram, a good time for old and new participants to come together and reflect on past accomplishments and future activities. We hope that this is a convenient time for everyone and we look forward to another full and complete program. We'll develop the agenda as the time draws nearer. Best wishes, Ron and Annie

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fighting timeouts in XLE grammars?
by Agnieszka Patejuk 09 Oct '13

09 Oct '13

Dear all, We've been developing POLFIE, an LFG grammar of Polish, at ICS PAS for over 3 years. We'd like to concentrate on extending the empirical scope of the grammar, but we're having performance issues which affect the results quite badly. Currently we're testing the grammar on sentences extracted from Składnica, a treebank of Polish. There are 8333 sentences, average sentence length is 10 (all segments are counted, including punctuation). How are these sentences parsed? – an individual dictionary is created for each sentence (so the words are already disambiguated morphosyntactically) – each sentence is parsed on its own, in one XLE run. The following performance variables are used when parsing: – 100 seconds (set timeout 100) – 4096 MB memory (set max_xle_scratch_storage 4096). Current results (out of 8333 sentences): – parsed: 6926 – failed: 154 – out of memory: 11 – timeout: 1228 – unknown error: 14 Almost 15% of sentences are timed out, which is very worrying. The average length of a parsed sentence is almost 9 (8.74), while the average length of a timed out sentence is almost 19 (18.67). Have you had similar problems? Are you parsing real sentences, how long are your sentences? Do you have any suggestions what we could do so as to reduce the number of timed out sentences? Best, Agnieszka

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ParGram/XLE Redmine
by Sebastian Sulger 15 Aug '13

15 Aug '13

Hi all, In an effort to be a little more sophisticated about websites/wikis/forums, I have created a Redmine (http://www.redmine.org/) site for collaborative work on all things related to ParGram/XLE. The site is at: http://typo.uni-konstanz.de/redmine The platform has two projects: ParGram and XLE. - ParGram project: wiki, calendar, documents modules. This wiki replaces the old one (http://typo.uni-konstanz.de/pargramwiki is obsolete, so please update your bookmarks). - XLE project: documents, support forum. The support forum is for XLE related questions. The idea here is that we can give some support to people new to XLE (this was a suggestion that came up during the Debrecen meeting). Only people that are registered with the Redmine system are allowed to make changes (create/update wikipages, post forum messages). You can create your account, I will then activate it. To simply view the pages, one does not need an account. Feel free to distribute the above address to people interested in ParGram/XLE matters. ---- On a related note, the ParGram workspace with all the files from past meetings is here: http://ling.uni-konstanz.de/pages/home/pargram_urdu/pargram To access that page, you (still) need a user account, which you can get by contacting Anja Leiderer (anja.leiderer(a)hotmail.de) with your desired username/password combination. Please contact me with any questions that may come up. Enjoy your holidays! Best, Jani -- Sebastian Sulger FB Sprachwissenschaft Universität Konstanz http://ling.uni-konstanz.de/pages/home/sulger

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REMINDER: Extension of ParGramBank
by Sebastian Sulger 06 Jun '13

06 Jun '13

Hi everyone, this email is a reminder for those grammar projects that take part in ParGramBank. We had decided we should extend the treebank *by June 30th* to include all 50 of last year's test sentences (I attach them here for your convenience). Extending the treebank by the end of June will enable us to discuss issues/exchange ideas concerning the treebank (e.g., wrt. alignment) at this year's ParGram meeting in Debrecen. It would be great if as many of you as possible could participate in making this treebank a success! If your grammar project is not a part of ParGramBank as of yet, please send me an email to find out how to contribute in the future. Best, Jani (from the Urdu grammar team at Konstanz) -- Sebastian Sulger FB Sprachwissenschaft Universitaet Konstanz http://ling.uni-konstanz.de/pages/home/sulger

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