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2004_TREC_XML_MEDLINE_A.gz 553M
2004_TREC_XML_MEDLINE_B.gz 595M
2004_TREC_XML_MEDLINE_C.gz 566M
2004_TREC_XML_MEDLINE_D.gz 572M
2004_TREC_XML_MEDLINE_E.gz 605M