Kai Hong


2015

pdf bib
System Combination for Multi-document Summarization
Kai Hong | Mitchell Marcus | Ani Nenkova
Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing

2014

pdf bib
A Repository of State of the Art and Competitive Baseline Summaries for Generic News Summarization
Kai Hong | John Conroy | Benoit Favre | Alex Kulesza | Hui Lin | Ani Nenkova
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

In the period since 2004, many novel sophisticated approaches for generic multi-document summarization have been developed. Intuitive simple approaches have also been shown to perform unexpectedly well for the task. Yet it is practically impossible to compare the existing approaches directly, because systems have been evaluated on different datasets, with different evaluation measures, against different sets of comparison systems. Here we present a corpus of summaries produced by several state-of-the-art extractive summarization systems or by popular baseline systems. The inputs come from the 2004 DUC evaluation, the latest year in which generic summarization was addressed in a shared task. We use the same settings for ROUGE automatic evaluation to compare the systems directly and analyze the statistical significance of the differences in performance. We show that in terms of average scores the state-of-the-art systems appear similar but that in fact they produce very different summaries. Our corpus will facilitate future research on generic summarization and motivates the need for development of more sensitive evaluation measures and for approaches to system combination in summarization.

pdf bib
Improving the Estimation of Word Importance for News Multi-Document Summarization
Kai Hong | Ani Nenkova
Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics

2012

pdf bib
Lexical Differences in Autobiographical Narratives from Schizophrenic Patients and Healthy Controls
Kai Hong | Christian G. Kohler | Mary E. March | Amber A. Parker | Ani Nenkova
Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning