In this paper, we discuss how to annotate coreference and predicate-argument relations in Japanese written text. There have been research activities for building Japanese text corpora annotated with coreference and predicate-argument relations as are done in the Kyoto Text Corpus version 4.0 (Kawahara et al., 2002) and the GDATagged Corpus (Hasida, 2005) . However, there is still much room for refining their specifications. For this reason, we discuss issues in annotating these two types of relations, and propose a new specification for each. In accordance with the specification, we built a large-scaled annotated corpus, and examined its reliability. As a result of our current work, we have released an annotated corpus named the NAIST Text Corpus 1 , which is used as the evaluation data set in the coreference and zero-anaphora resolution tasks in Iida et al. (2005) and Iida et al. (2006) .
For Japanese PAS analysis research, the NAIST Text Corpus has been used as a standard benchmark REF .
Annotating a Japanese Text Corpus with Predicate-Argument and Coreference Relations
Linguistic Annotation Workshop
Computer Science