Anchor: A group of people look on as a large bunch of swimmers plow through the water near the banks.
Entailed: A bunch of people are about to get in the water.
Contradiction: A bunch of people can't swim.
Contradiction: A man in a white shirt and cargo pants sitting on a bench,
Contradiction: Smith has a very wide range of knowledge and has more than enough ideas.   
Contradiction: A man is swimming in the river.
Contradiction: The case study method has been used by other federal agencies successfully.