Anchor: Becker, Howard S. Problems of Inference and Proof in Participant Observation.
Entailed: Problems of Inference and Proof in Participant Observation is related to Howard Becker.
Contradiction: Problems of Inference and Proof in Participant Observation is not related to Howard Becker.
Contradiction: David Daniel is a baritone. 
Contradiction: A uniformed person stands near a bridge.
Contradiction: I read an interview with a man whose dog ingested a bottle of Hawaiian Tropic. 
Contradiction: There is the possibility that someone talked after the event.