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Ohsumed includes medical abstracts from the MeSH categories of the year 1991. In [Joachims, 1997] were used the first 20,000 documents divided in 10,000 for training and 10,000 for testing. The specific task was to categorize the 23 cardiovascular diseases categories. After selecting the such category subset, the unique abstract number becomes 13,929 (6,286 for training and 7,643 for testing). As current computers can easily manage larger number of documents we make available all 34,389 cardiovascular diseases abstracts out of 50,216 medical abstracts contained in the year 1991.
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