We reduce phrase-representation parsing to dependency parsing. Our reduction
is grounded on a new intermediate representation, "head-ordered dependency
trees", shown to be isomorphic to constituent trees. By encoding order
information in the dependency labels, we show that any off-the-shelf, trainable
dependency parser can be used to produce constituents. When this parser is
non-projective, we can perform discontinuous parsing in a very natural manner.
Despite the simplicity of our approach, experiments show that the resulting
parsers are on par with strong baselines, such as the Berkeley parser for
English and the best single system in the SPMRL-2014 shared task. Results are
particularly striking for discontinuous parsing of German, where we surpass the
current state of the art by a wide margin.

本文提出了一种新的中间表示法，基于这种表示法，我们将短语表示分析转化为依存分析，并通过在依存标签中编码顺序信息，表明任何可训练的依存分析器都可以用来生成 constituents。尽管我们的方法很简单，但实验证明，结果与强基准线（例如伯克利解析器和 SPMRL 2014 共享任务中最好的单一系统）不相上下，特别是在德语断点解析方面，我们超过了当前的技术水平。