Leveraging Concept-Enhanced Pre-Training Model and Masked-Entity Language Model for Named Entity Disambiguation

Abstract

Named Entity Disambiguation (NED) refers to the task of resolving multiple named entity mentions in an input-text sequence to their correct references in a knowledge graph. We tackle NED problem by leveraging two novel objectives for pre-training framework, and propose a novel pre-training NED model. Especially, the proposed pre-training NED model consists of: (i) concept-enhanced pre-training, aiming at identifying valid lexical semantic relations with the concept semantic constraints derived from external resource Probase; and (ii) masked entity language model, aiming to train the contextualized embedding by predicting randomly masked entities based on words and non-masked entities in the given input-text. Therefore, the proposed pre-training NED model could merge the advantage of pre-training mechanism for generating contextualized embedding with the superiority of the lexical knowledge (e.g., concept knowledge emphasized here) for understanding language semantic. We conduct experiments on the CoNLL dataset and TAC dataset, and various datasets provided by GERBIL platform. The experimental results demonstrate that the proposed model achieves significantly higher performance than previous models.

Keywords

• Named entity disambiguation
• pre-training
• lexical knowledge