Identification of singleton mentions in Russian

Аннотация This paper describes a pilot study of the problem of detecting singleton mentions in Russian texts. A noun phrase is considered a singleton mention if it is the only referent of some entity. We discuss various morphosyntactic and lexical features, some of which were used for analogous tasks for English and propose new features derived from the discourse analysis. Testing the machine learning classifiers trained with the use of proposed features, we conclude that although the quality of classifiers is significantly lower than for English, they still have rather high precision and thus can be helpful in various tasks of mention tracking.