<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Lafferty, J., McCallum, A., & Pereira, F. C. (2001)</hi>: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Conditional random fields: Probabilistic models for segmenting and labeling sequence data.</hi>