Open AccessSignalling Implicit Relations: A PDTB - RST Comparison
Author(s) -
Lucie Poláková,
Jiří Mírovský,
Pavlína Synková
Publication year - 2017
Publication title -
dialogue and discourse
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 5
ISSN - 2152-9620
DOI - 10.5087/dad.2017.210
Subject(s) - treebank , computer science , intersection (aeronautics) , rhetorical question , natural language processing , linguistics , annotation , artificial intelligence , coherence (philosophical gambling strategy) , mathematics , philosophy , statistics , engineering , aerospace engineering
Describing implicit phenomena in discourse is known to be a problematic task, from both theoretical and empirical perspectives. The present article contributes to this topic by a novel comparative analysis of two prominent annotation approaches to discourse relations (coherence relations) that were carried out on the same texts. We compare the annotation of implicit relations in the Penn Discourse Treebank 2.0, i.e. discourse relations not signaled by an explicit discourse connective, to the recently released analysis of signals of rhetorical relations in the RST Signalling Corpus (RST-SC). The intersection of corresponding pairs of relations is rather a small one, but it shows a clear tendency: unlike the overall signal distribution in the RST-SC, more than half of the signals in the studied intersection are of semantic type, formed mostly by loosely dened lexical chains. Our data transformation allows for a simultaneous depiction and detailed study of the two resources.