An existing straightforward approach (Peng et al., 2016;Xiong et al., 2016) involves creating a set of relevant entities using an entity linking system to detect and disambiguate the names of entities in a document.
this approach is problematic because (1) entity linking systems produce disambiguation errors (Cornolti et al., 2013), and (2) entities appearing in a document are not necessarily relevant to the given document (Gamon et al., 2013;Dunietz and Gillick, 2014).