Preprocessing Technology

Coreference is a complex phenomenon involving a variety of linguistic factors: from surface similarity to morphological agreement, specific syntactic constraints, semantics, salience and encyclopedic knowledge. It is therefore essential for any coreference resolution system to rely on a rich linguistic representation of a document to be analyzed. This chapter focuses on the preprocessing technology, taking into consideration a variety of external tools needed to create such representations, and shows how to combine them in a Preprocessing Pipeline, in order to extract mentions of entities in a given document, describing their linguistic properties.