Anchor: "What? Listen!" I looked round, the others were out of earshot. 
Entailed: The others couldn't hear. 
Contradiction: The others heard.
Contradiction: People were standing still.
Contradiction: Four guys are walking along a trail.
Contradiction: China's domestic urea production fell between 1994 and 1997.
Contradiction: Free information does not seem welcomed when it contains your own personal data.