Furthermore, we carefully investigated the TAC-KBP SF 2012 ground truth corpus and find that 94.36% of the biographical facts are mentioned in a sentence containing indicative fact-specific triggers.
we compare with two successful approaches: (1) the combination of distant supervision and rules (e.g., (Grishman, 2013;); (2) patterns based on dependency paths (e.g., Yu et al., 2013)).