In early stage, most researches rely on the similarity between the context of the mention and the definition of candidate entities by proposing different measuring criteria such as dot product, cosine similarity, KL divergence, Jaccard distance and more complicated ones (Bunescu and Pasca, 2006;Cucerzan, 2007;Zheng et al., 2010;Hoffart et al., 2011;Zhang et al., 2011).
these methods mainly rely on text similarity but neglect the internal structure between mentions.