Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

9-2015

Abstract

A microblog repost tree provides strong clues on how an event described therein develops. To help social media users capture the main clues of events on microblogging sites, we propose a novel repost tree summarization framework by effectively differentiating two kinds of messages on repost trees called leaders and followers, which are derived from contentlevel structure information, i.e., contents of messages and the reposting relations. To this end, Conditional Random Fields (CRF) model is used to detect leaders across repost tree paths. We then present a variant of random-walk-based summarization model to rank and select salient messages based on the result of leader detection. To reduce the error propagation cascaded from leader detection, we improve the framework by enhancing the random walk with adjustment steps for sampling from leader probabilities given all the reposting messages. For evaluation, we construct two annotated corpora, one for leader detection, and the other for repost tree summarization. Experimental results confirm the effectiveness of our method.

Discipline

Databases and Information Systems

Research Areas

Data Science and Engineering

Publication

Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing (EMNLP 2015)

First Page

2168

Last Page

2178

Identifier

10.18653/v1/D15-1259

Publisher

Association for Computational Linguistics

City or Country

Lisbon, Portugal

Additional URL

https://doi.org/10.18653/v1/D15-1259

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