@misc{cogprints214,
          volume = {3},
          number = {1},
           title = {An Analysis of English Punctuation: The Special Case of Comma},
          author = {Murat Bayraktar and Bilge Say and Varol Akman},
            year = {1998},
           pages = {33--57},
         journal = {International Journal of Corpus Linguistics},
        keywords = {punctuation, structural punctuation marks, comma, the Penn Treebank, the Wall Street Journal, corpus linguistics.},
             url = {http://cogprints.org/214/},
        abstract = {Punctuation has usually been ignored by researchers in computational linguistics over the years. Recently, it has been realized that a true understanding of written language will be impossible if punctuation marks are not taken into account. This paper contains the details of a computer-aided exercise to investigate English punctuation practice for the special case of comma (the most significant punctuation mark) in a parsed corpus. The study classifies the various ``structural'' uses of the comma according to the syntax-patterns in which a comma occurs. The corpus (Penn Treebank) consists of syntactically annotated sentences with no part-of-speech tag information about individual words.}
}

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