Andrew Carlson Justin Betteridge Richard C. Wang Estevam R. Hruschka Jr. Tom M. Mitchell Coupled semi-supervised learning for information extraction. 101-110 2010 WSDM http://doi.acm.org/10.1145/1718487.1718501 conf/wsdm/2010 db/conf/wsdm/wsdm2010.html#CarlsonBWHM10