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It all starts with entities: A Salient entity topic model

Published online by Cambridge University Press:  22 November 2019

Chuan Wu Open the ORCID record for Chuan Wu [Opens in a new window] ,
Evangelos Kanoulas  and
Maarten de Rijke
Chuan Wu*
Affiliation:
School of Information Management, Wuhan University, Wuhan, China Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands
Evangelos Kanoulas
Affiliation:
Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands
Maarten de Rijke
Affiliation:
Informatics Institute, University of Amsterdam, Amsterdam, The Netherlands
*
*Corresponding author. Email: [email protected]
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Abstract

Entities play an essential role in understanding textual documents, regardless of whether the documents are short, such as tweets, or long, such as news articles. In short textual documents, all entities mentioned are usually considered equally important because of the limited amount of information. In long textual documents, however, not all entities are equally important: some are salient and others are not. Traditional entity topic models (ETMs) focus on ways to incorporate entity information into topic models to better explain the generative process of documents. However, entities are usually treated equally, without considering whether they are salient or not. In this work, we propose a novel ETM, Salient Entity Topic Model, to take salient entities into consideration in the document generation process. In particular, we model salient entities as a source of topics used to generate words in documents, in addition to the topic distribution of documents used in traditional topic models. Qualitative and quantitative analysis is performed on the proposed model. Application to entity salience detection demonstrates the effectiveness of our model compared to the state-of-the-art topic model baselines.

Keywords

Entity SalienceEntity Topic Model
Type
Article
Information
Natural Language Engineering , Volume 26 , Issue 5 , September 2020 , pp. 531 - 549
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Copyright
© Cambridge University Press 2019

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