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LCS and Approximate Interlingua at UMD

LCS and Approximate Interlingua at UMD. Semantic Annotation Planning Meeting April 14, 2004 Bonnie J. Dorr University of Maryland. This is the new piece to be added in Approx Interlingua. Lexical Conceptual Structure (LCS).

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LCS and Approximate Interlingua at UMD

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  1. LCS and Approximate Interlingua at UMD Semantic Annotation Planning Meeting April 14, 2004 Bonnie J. Dorr University of Maryland

  2. This is the new piece to be addedin Approx Interlingua Lexical Conceptual Structure (LCS) • LCS is composed of semantic primitives and semantic domains (Jackendoff, Dorr) • Primitives: CAUSE, GO, BE, STAY, etc. • Domains: Location, Identity, Communication • Associated Features • Theta roles (relations between entities and events) • Mapping to Propbank roles • Levin class • WordNet sense(s) • Argument features • Lexical-semantic argument structure • What is missing? • Speech acts • Relations between entities • Beliefs, certainty, truth, falsehood • Mappings that enable paraphrase recognition/generation

  3. English LCS Lexicon Entry http://clipdemos.umiacs.umd.edu/englcslex/ ( :DEF_WORD "enter" :CLASS "51.1.a" :WN_SENSE (("1.5" 01152122)("1.6" 01376901) ("1.7.1" 01586576) ("2.0" 01958650)) :PROPBANK ("arg1 arg2(from) arg2(to)") :THETA_ROLES ((1 "_th,src(from),goal(to)")) :LCS (go loc (* thing 2)((* from 3) loc (thing 2) (at loc (thing 2)(thing 4))) ((* [to] 5) loc (thing 2) ([at] loc (thing 2)(thing 6)) (enter+ingly 26)) :VAR_SPEC ((5 :optional) (3 :optional) (2 (animate +))) ) AGENTTHEMESOURCEGOALPREDICATEPERCEIVEDLOCATION POSSESSEDTIMEBENEFICIARYINSTRUMENTPURPOSEPROPOSITION

  4. What we annotate (to be talked about in context of IAMTC)

  5. Approximate Interlingua (AIL) Same features as LCS, except: • Argument structure is shallower: Top-level semantic primitives, e.g., CAUSE, GO, BE, STAY, are retained. • Enables paraphrase via CatVar features: Allow expansion of any TL words to their other parts of speech • excelV at directingN • directsVwellADV • excellentADV directorshipN • Tralex: • dirigir  {direct, guide, drive } • buen  { well, good, excellent } • The organization excels at directing ground operations. vs. The organization directs ground operations well. vs. The organization provides excellent directorship of ground operations. • CatVar is downloadable: http://clipdemos.umiacs.umd.edu/catvar/

  6. Comparison of LCS to AIL The struggle against the drug lords in Colombia will be a near thing

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