Anchor: You have spied upon them.
Entailed: You have seen them while you were hiding. 
Contradiction: You approached them out in the open. 
Contradiction: I don't know, I don't remember anything about it.
Contradiction: In 2004, the US's demand is expected to grow to 227,000 tons.
Contradiction: The workers are in the office at a meeting.
Contradiction: There is someone with red hair.