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Data-driven Approaches for Information Structure Identification
This paper investigates automatic identi- fication of Information Structure (IS) in texts. The experiments use the Prague Dependency Treebank which is annotated with IS following the Praguian approach of Topic …...
Non-Projective Dependency Parsing using Spanning Tree Algorithms
We formalize weighted dependency pars- ing as searching for maximum spanning trees (MSTs) in directed graphs. Using this representation, the parsing algorithm of Eisner (1996) is sufficient for search- ing …...
Pseudo-Projective Dependency Parsing
In order to realize the full potential of dependency-based syntactic parsing, it is desirable to allow non-projective depen- dency structures. We show how a data- driven deterministic dependency parser, in …...
Constraints on Non-Projective Dependency Parsing
We investigate a series of graph-theoretic constraints on non-projective dependency parsing and their effect on expressivity, i.e. whether they allow naturally occurring syntactic constructions to be adequately represented, and efficiency, …...
Graph Transformations in Data-Driven Dependency Parsing
Transforming syntactic representations in order to improve parsing accuracy has been exploited successfully in statistical parsing systems using constituency-based representations. In this paper, we show that similar transformations can give …...
Simple Semi-supervised Dependency Parsing
We present a simple and effective semi- supervised method for training dependency parsers. We focus on the problem of lex- ical representation, introducing features that incorporate word clusters derived from …...
TectoMT: Highly Modular MT System with Tectogrammatics Used as Transfer Layer
We present a new English→Czech machine translation system combining linguistically motivated layers of language description (as defined in the Prague Dependency Treebank annotation scenario) with statistical NLP ap- proaches. 1...
An Empirical Study of Semi-supervised Structured Conditional Models for Dependency Parsing
This paper describes an empirical study of high-performance dependency parsers based on a semi-supervised learning ap- proach. We describe an extension of semi- supervised structured conditional models (SS-SCMs) to the …...
Annotation of Morphological Meanings of Verbs Revisited
AbstractMeanings of morphological categories are an indispensable component of representation of sentence semantics. In the Prague Dependency Treebank 2.0, sentence semantics is represented as a dependency tree consisting of labeled …...
Mapping between Dependency Structures and Compositional Semantic Representations
AbstractThis paper investigates the mapping between two semantic formalisms, namely the tectogrammatical layer of the Prague Dependency Treebank 2.0 (PDT) and (Robust) Minimal Recursion Semantics ((R)MRS). It is a first …...
Typical Cases of Annotators’ Disagreement in Discourse Annotations in Prague Dependency Treebank
AbstractIn this paper, we present the first results of the parallel Czech discourse annotation in the Prague Dependency Treebank 2.0. Having established an annotation scenario for capturing semantic relations crossing …...
Valency and Word Order in Czech — A Corpus Probe
AbstractWe present a part of broader research on word order aiming at finding factors influencing word order in Czech (i.e. in an inflectional language) and their intensity. The main aim …...
Coreference in Prague Czech-English Dependency Treebank
AbstractWe present coreference annotation on parallel Czech-English texts of the Prague Czech-English Dependency Treebank (PCEDT). The paper describes innovations made to PCEDT 2.0 concerning coreference, as well as coreference information …...
Discourse Coherence Through the Lens of an Annotated Text Corpus: A Case Study
A corpus-based study of local coherence as established by anaphoric links between the elements in the thematic (Topic) and the rhematic (Focus) parts of sentences in different genres of discourse. …...
Conjunct Lengths in English, Dependency Length Minimization, and Dependency Structure of Coordination
AbstractThis paper confirms that, in English binary coordinations, left conjuncts tend to be shorter than right conjuncts, regardless of the position of the governor of the coordination. We demonstrate that …...