Anchor: a group of people out on the water.
Entailed: A group of people are out on the water
Contradiction: a group of people are sleeping
Contradiction: Napoleon sent his officers to explore land but they didn't find anything interesting.
Contradiction: The specification of the product that has been reviewed in a formal way and agreed upon serves as 
Contradiction: Adults have fun on a boat in the middle of the lake.
Contradiction: The paneling resembled dark wood grain, so it stayed dark even after half a dozen coats.