Roman Yangarber Lauri Jokipii Antti Rauramo Silja Huttunen Extracting Information about Outbreaks of Infectious Epidemics. 2005 conf/naacl/2005 HLT/EMNLP http://acl.ldc.upenn.edu/H/H05/H05-2012.pdf db/conf/naacl/naacl2005.html#YangarberJRH05