To build text summaries of high quality, nuclearity is not sufficient. Marcu, D. In Working notes, AAAI Spring Symposium on Intelligent Text Summarization, pages 1–8, Stanford, March, 1998.
abstract   bibtex   
Researchers in discourse have long hypothesized that the nuclei of a rhetorical structure tree provide a good summary of the text for which that tree was built. In this paper, I discuss a psycholinguistic experiment that validates this hypothesis, but that also shows that the distinction between nuclei and satellites is not sufficient if we want to build summaries of very high quality. I empirically compare various techniques for mapping discourse trees into partial orders that reflect the importance of the elementary textual units in texts and I discuss both their strengths and weaknesses.
@InProceedings{	  marcu7,
  author	= {Daniel Marcu},
  title		= {To build text summaries of high quality, nuclearity is not
		  sufficient},
  booktitle	= {Working notes, AAAI Spring Symposium on Intelligent Text
		  Summarization},
  address	= {Stanford},
  month		= {March},
  year		= {1998},
  pages		= {1--8},
  abstract	= {Researchers in discourse have long hypothesized that the
		  nuclei of a rhetorical structure tree provide a good
		  summary of the text for which that tree was built. In this
		  paper, I discuss a psycholinguistic experiment that
		  validates this hypothesis, but that also shows that the
		  distinction between nuclei and satellites is not sufficient
		  if we want to build summaries of very high quality. I
		  empirically compare various techniques for mapping
		  discourse trees into partial orders that reflect the
		  importance of the elementary textual units in texts and I
		  discuss both their strengths and weaknesses.},
  download	= {http://www.isi.edu/~marcu/papers/summarization-aaai98.ps}
}

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