Anchor: Two men one has a white shirt and other one has on a brown shirt and sunglasses.
Entailed: One man wearing white shirt and another man wearing brown shirt with sunglasses
Contradiction: some men standing in a park
Contradiction: We know the exact reasoning. 
Contradiction: There are at least three people.
Contradiction: Food makes people hungry
Contradiction: He was watching to see if he could find any signs of life.