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Focus Annotation in Reading Comprehension Data

Ramon Ziai,Walt Detmar Meurers

Published 2014 in LAW@COLING

ABSTRACT

When characterizing the information structure of sentences, the so-called focus identifies the part of a sentence addressing the current question under discussion in the discourse. While this notion is precisely defined in formal semantics and potentially very useful in theoretical and practical terms, it has turned out to be difficult to reliably annotate focus in corpus data. We present a new focus annotation effort designed to overcome this problem. On the one hand, it is based on a task-based corpus providing more explicit context. The annotation study is based on the CREG corpus (Ott et al., 2012), which consists of answers to explicitly given reading comprehension questions. On the other hand, we operationalize focus annotation as an incremental process including several substeps which provide guidance, such as explicit answer typing. We evaluate the focus annotation both intrinsically by calculating agreement between annotators and extrinsically by showing that the focus information substantially improves the automatic meaning assessment of answers in the CoMiC system (Meurers et al., 2011).

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