Evaluation of Knowledge-Based Recognition of Spatial Expressions for Polish

Abstract

In the paper, we deal with the problem of spatial expression recognition. The goal of this task is to recognize in text information structures that represent a relative spatial relationship between two objects (a trajector and a landmark) indicated by a preposition of location, for example, a book on the table. We used the Corpus of Polish Spatial Texts (PST) to evaluate the knowledge-based approach to spatial expression recognition. We focused on the evaluation of the recall of the method for filtering candidates of spatial expressions. Our goal was to identify the bottlenecks of the existing preprocessing pipeline and the knowledge-based approach. We have shown that it is necessary to focus on three main areas, i.e., coreference resolution (relations from implied subjects and pronouns to nouns and named entities), word sense disambiguation, and cognitive schemas.