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Wide-Coverage Neural A* Parsing for Minimalist Grammars

机译:极简语法的宽覆盖神经A *解析

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Minimalist Grammars (Stabler, 1997) are a computationally oriented, and rigorous for-malisation of many aspects of Chomsky's (1995) Minimalist Program. This paper presents the first ever application of this formalism to the task of realistic wide-coverage parsing. The parser uses a linguistically expressive yet highly constrained grammar, together with an adaptation of the A* search algorithm currently used in CCG parsing (Lewis and Steedman. 2014; Lewis et al., 2016), with supertag probabilities provided by a bi-LSTM neural network supertagger trained on MG-bank, a corpus of MG derivation trees. We report on some promising initial experimental results for overall dependency recovery as well as on the recovery of certain unbounded long distance dependencies. Finally, although like other MG parsers, ours has a high order polynomial worst case time complexity, we show that in practice its expected time complexity is (O(n~3). The parser is publicly available.~1
机译:极简主义文法(Stabler,1997年)是针对计算的,并且严格地规范了Chomsky(1995年)极简主义计划的许多方面。本文介绍了这种形式主义在实际的广域解析任务中的首次应用。解析器使用语言表达但高度受限的语法,并改编了CCG解析中当前使用的A *搜索算法(Lewis和Steedman。2014; Lewis等人,2016),并具有由bi-LSTM提供的超标签概率神经网络超级标尺在MG-bank(MG衍生树的主体)上训练。我们报告了一些有关整体依赖恢复的有希望的初步实验结果,以及某些不受限制的长距离依赖的恢复。最后,尽管我们像其他MG解析器一样,具有高阶多项式最坏情况下的时间复杂度,但我们证明,在实践中,其预期的时间复杂度为(O(n〜3)。该解析器可公开获得。

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