LenC: A Redundancy-Aware Length Control Framework for Extractive Summarization

While extractive summarization is an important approach of the NLP text summarization task, redundancy in the generated extractive summary is always a problem. Previous works usually set the length of the output summary to a fixed number, which might only be appropriate for some of the documents while too long for others. At the same time, though extractive summarization possesses high readability...