Báo cáo khoa học: "Discriminative Reranking for Semantic Parsing" pot

... SCISSOR for reranking, for a full description of SCISSOR see Ge and Mooney (2005). In SCISSOR, the generation of semantic labels on modifiers are constrained by semantic subcat- egorization frames, for ... semantic parsing. We examine if the features used in reranking syntactic parses can be adapted for semantic pars- ing, more concretely, for reranking the top SAPTs fro...

Ngày tải lên: 23/03/2014, 18:20

... 5. Semantic help for the parser As we mentioned earlier, any parser will occasionally need semantic help. In Marcus-type parsers, this need occurs in rules that have the form "If semantics ... "Procedural semantics for a question-answering machine." AFIPS conference proceed- ings, 33 (Fall Joint Computer Conference), 1968. 457-471. 73 A FOUNDATION FOR SEMANTI...

Ngày tải lên: 31/03/2014, 17:20

... (Shieber et al., 1995), where items are called formula schemata, deduc- tion steps are inference rules, hypothesis are ax- ioms and final items are goal formulas. A parsing schema can be generalized ... taken place in the node N r and therefore further adjunctions on the same node are forbidden. A value of false indicates that no adjunction was performed on that node. In this case,...

Ngày tải lên: 22/02/2014, 03:20

... of the Association for Computational Linguistics, pages 316–324, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics Discriminative Pruning for Discriminative ... ITG. For instance, there are two parses for three consecutive word pairs, viz. [/ [/ / ] ] and [[/ /] /] . The problem of re- dundancy is fixed by adopting ITG normal for...

Ngày tải lên: 20/02/2014, 04:20

... difl'erent form of disjunction, OR: (~OR formulal formula2). In terms of implementation, think of this as inferring formula1 in all possible ways and then asserting the dis- junction of the formula,s ... refereuts for "'it" (probability rule 4). (One derivation has it that since one pays for what one is shopping for, and Jack is shopping for milk, he mdst...

Ngày tải lên: 21/02/2014, 20:20

... Data-Oriented Semantic Analysis To use the DOP method not just for syntactic anal- ysis, but also for semantic interpretation, four steps must be taken: 1. decide on a formalism for representing ... the semantic formulas of its daughter nodes. Using this convention, the semantic annotation of the corpus trees is indicated as follows: • For every meaningful lexical node...

Ngày tải lên: 22/02/2014, 03:20

... transform syntactic as well as morphological variations of names into a normalized name form. Basic trans- formations can be achieved via pattern match- ing (regular expressions) while for more ... of information are represented as ??. This way, the semantic representation provides all the information about the chemical structure that is given by the name. Thus, it is an ideal basis for...

Ngày tải lên: 08/03/2014, 01:20

... first one to identify the most suitable semantic frame for a marked lexical predicate (target, henceforth) in a sentence, and the second for performing semantic role labeling (SRL) given the frame. The ... correspond to potential predicates and use label propa- gation to learn possible semantic frames for new ones. The label-propagated graph is used within a frame -semantic parser...

Ngày tải lên: 23/03/2014, 16:20

... features. In addition, we enforce label consistency and semantic coherence at record level. Other related works perform structured relation discovery for different settings of information ex- traction. ... for each tar- get relation, an integrated model to weight the dif- ferent extraction options, including for example the likely lengths for events, or the fact that start times sho...

Ngày tải lên: 30/03/2014, 17:20

... con- structions) may contribute semantic information, but we assume that this information obeys all the same constraints as the semantics for a sign, so in effect such a rule is semantically equivalent ... actual logical forms we compose partial descriptions to handle semantic underspecification. 8 Conclusions and future work We have developed a framework for formally specifying semant...

Ngày tải lên: 31/03/2014, 04:20