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An analysis of clausal coordination using synchronous tree adjoining grammar

机译：基于同步树邻接语法的从句协调分析

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This paper presents a novel analysis of clausal coordination with shared arguments using synchronous tree adjoining grammar (STAG), a pairing of a tree adjoining grammar (TAG) for syntax and a TAG for semantics. In clausal coordination, one or more arguments can be shared by the verbal predicates of the conjuncts, as in Sue likes and Kim hates Pete, where an object argument Pete is shared by likes and hates. As the predicate-argument structure must be represented within each predicative elementary tree in TAG, modelling argument sharing across clauses poses an interesting challenge for TAG. A widely adopted approach within the TAG literature at present is to employ the conjoin operation (Sakar and Joshi, 1996, Proceedings of COLING '96, 610-615), a non-standard tree-composing operation in TAG. This operation applies across elementary trees to identify and merge the arguments from each clause, yielding a derivation structure in which the shared arguments are combined with multiple elementary trees and a derived tree in which the shared arguments are dominated by multiple verbal projections. In contrast, our STAG analysis pairs a syntactic elementary tree that participates in the derivation of clausal coordination with a semantic elementary tree that includes a lambda-term to abstract over the shared argument. This allows the sharing of arguments in coordination to be instantiated in semantics, without being represented in syntax in the form of multiple dominance, utilizing only the standard TAG operations, substitution and adjoining.
机译：本文介绍了一种使用同步树邻接语法（STAG），一对树邻接语法（TAG）进行语法和TAG语义对的带有共享参数的子句协调的新颖分析。在子句协调中，合词的谓词可以共享一个或多个参数，例如在Sue likes和Kim hates Pete中，宾语参数Pete由likes和hate共享。由于必须在TAG的每个谓词基本树中表示谓词-自变量结构，因此跨子句建模自变量共享对TAG提出了一个有趣的挑战。当前在TAG文献中广泛采用的方法是采用联合操作（Sakar和Joshi，1996，COLING '96，610-615，Proceedings of Coling '96，610-615），这是TAG中的非标准树构成操作。此操作适用于基本树，以标识和合并每个子句中的参数，从而生成派生结构，其中共享参数与多个基本树组合，以及派生树，其中共享参数由多个言语投影控制。相反，我们的STAG分析将参与语意协调推导的句法基本树与包含lambda项以抽象化共享参数的语义基本树配对。这样，就可以在语义上实例化协调中的参数共享，而不必以语法（仅使用标准TAG运算，替换和邻接）以多重优势的形式表示。

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