Download presentation
Presentation is loading. Please wait.
1
LCS and Approximate Interlingua at UMD Semantic Annotation Planning Meeting April 14, 2004 Bonnie J. Dorr University of Maryland
2
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 This is the new piece to be added in Approx Interlingua
3
English LCS Lexicon Entry ( :DEF_WORD "enter"enter :CLASS "51.1.a"51.1.a :WN_SENSE (("1.5" 01152122)("1.6" 01376901) ("1.7.1" 01586576) ("2.0" 01958650))01586576 :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 +))) ) AGENT THEME SOURCE GOAL PREDICATE PERCEIVED LOCATION POSSESSED TIME BENEFICIARY INSTRUMENT PURPOSE PROPOSITION http://clipdemos.umiacs.umd.edu/englcslex/
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 excel V at directing N directs V well ADV excellent ADV directorship N 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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.