Premise: These are three young black men who appear to be very similar in age and height and facial features.

Hypothesis: Three similar black men stand next to each other
Relation: entailment

Hypothesis: The guys are swimming in the sea.
Relation: contradiction

Hypothesis: Three black men, triplets, stand next to each other
Relation: neutral

Hypothesis: Three white men stand next to each other
Relation: contradiction

Hypothesis: A group of people.
Relation: neutral

Hypothesis: A gang of people waiting to play a game.
Relation: neutral