[Q] Premise: "Two brown and black dogs wrestle in the long grass."
Hypothesis: "There are two brown and black dogs."
Do we know that the hypothesis entailed by the premise?
[A] Having two brown and black dogs wrestling generally requires the existence of two brown and black dogs.
The answer is yes.

[Q] Given the sentence "A man in a blue tracksuit and a man in a red sweater prepare to play curling." is it true that "Two men compete against each other in an event."?
[A] Two men can prepare to play curling and not compete against each other in an event.
The answer is it is not possible to tell.

[Q] Premise: "A man looks at a fruit and vegetable stand as he walks by."
Hypothesis: "A man is sitting on a bench."
Do we know that the hypothesis entailed by the premise?
[A] The man can't walk by and be sitting on a bench at the same time.
The answer is no.