Dear Adam,
I looked into this some for my recent book, and from what I could find, no one has ever produced a fully comprehensive set of semantic roles (see Ch 8, thing #68). I'm not familiar with Sowa's system, but I think what's going on in VerbNet is that role names are re-used across predicates but not meant to carry the same content in those different uses.
Emily
Bender, Emily M. 2013. *Linguistic Fundamentals for Natural Language Processing: 100 Essentials from Morphology and Syntax*http://dx.doi.org/10.2200/S00493ED1V01Y201303HLT020. Synthesis Lectures on Human Language Technologies #20. Morgan & Claypool Publishers. http://dx.doi.org/10.2200/S00493ED1V01Y201303HLT020
On Sun, Feb 2, 2014 at 1:45 PM, Adam Przepiorkowski adamp@ipipan.waw.plwrote:
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.
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