L. Danlos and N. Research, Research in the 80' Extension of LTAG for semantics and discourse Nowadays NLP applied research Schützenberger and AI Outline 1 Research in the 70' 2 Research in the 80' 3 Extension of LTAG for semantics and discourse 4 Nowadays NLP applied research 5 Schützenberger and AI L. Danlos NLP Research in the 70' Research in the 80' Extension of LTAG for semantics and discourse Nowadays NLP applied research Schützenberger and AI Semantics, Synchronous TAG (STAG) (Shieber 1994) Synchronous TAG (STAG) extends TAG by taking the elementary structures to be pairs of TAG trees with links between particular nodes in those trees

L. Danlos and N. Research, Research in the 80' Extension of LTAG for semantics and discourse Nowadays NLP applied research Schützenberger and AI NLP Research in the 70' Research in the 80' Extension of LTAG for semantics and discourse Nowadays NLP applied research Schützenberger and AI Probabilistic context free grammars (PCFGs) Basic principles The probability of a derivation (parse) is the product of the probabilities of the productions used in that derivation

L. Danlos and N. , Research in the 70' Research in the 80' Extension of LTAG for semantics and discourse Nowadays NLP applied research Schützenberger and AI Which formal grammars for so-called noisy user-generated texts? English @Hii_ImFruiity nuin much at all juss chillin waddup w yu ?