Anchor: It was covered by several feet of ash during the eruption of c.1500 b.c. , but unlike the tragic city of Pompeii in Italy, no human remains have been found.
Entailed: The eruption of 1500 b.c. covered it in several feet of ash.
Contradiction: It was covered by several feet of ash and over one hundred human remains have been found.
Contradiction: Only men are running in the race.
Contradiction: My husband wanted to camp during summer vacation, that would have been fun, but we didn't do it. 
Contradiction: A person playing water polo.
Contradiction: I agree!