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Owen Rambow

Owen Rambow. 6 Minutes. Interests. Theory Syntax: its representation and computation (TAG), and its relation to discourse, prosody, semantics … Technologies/Resources Generation: sentence planning & realization Dependency parsing Dependency corpora Applications

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Owen Rambow

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  1. Owen Rambow 6 Minutes

  2. Interests • Theory • Syntax: its representation and computation (TAG), and its relation to discourse, prosody, semantics … • Technologies/Resources • Generation: sentence planning & realization • Dependency parsing • Dependency corpora • Applications • Generation applications (reports) • Machine translation • Dialog systems • Summarization

  3. Thesis (1994) • Formal representation for German syntax • Issue: combination of fixed and free word-order • Solution: use description of trees, not trees (as in TAG) • Current syntax interests: Tagalog, Arabic

  4. Generation: Sentence Planning • Work with Lyn Walker • Issue: choosing syntactic constructions to achieve communicative goals in dialog systems • Idea: use machine learning on preference-ranked options • Ongoing: multimedia/speech output (with Noémie) • Open issue: individual preferences • Summarization?

  5. Generation: Realization • Joint work with Srinivas Bangalore, John Chen • Use of declarative TAG grammar (hand-written or extracted) • Approach: stochastic choice on trees using arborescent & linear language models • Open issues: factoring of syntactic/lexical choice

  6. Dependency Parsing • Joint work with Alexis Nasr, Srinivas Bangalore, John Chen • Idea: transform TAG trees into FSMs/FSTs • Parse yields dependency tree • Parse FSMs CKY-style • Or, compose FSTs to a single large FST • Open issues: supertagging, probabilistic model, domain adaptation

  7. Corpora • PropBank (Penn project): annotation of PTB with predicate-argument structures • Verb-specific arg roles, lexicon • Project: mapping PropBank to other, more “semantic” forms of annotation (VerbNet, LCS, Prague)

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