Reuters Tracer: A Large Scale System of Detecting & Verifying Real-Time News Events from Twitter. - Xiaomo Liu; Quanzhi Li; Armineh Nourbakhsh; Rui Fang; Merine Thomas; Kajsa Anderson; Russ Kociuba; Mark Vedder; Steven Pomerville; Ramdev Wudali; Robert Martin; John Duprey; et al. (CIKM, 2016)