Premise: Two men wearing sombrero's in New York City.

Hypothesis: In New York City Hat is worn by a two guys
yes

Premise: Two bicyclists are racing each other on a dirt track.

Hypothesis: Two bicyclists are standing by their bikes near a dirt track
no

Premise: A young boy at a water park pouring a bucket water on a young girl in a swimsuit.

Hypothesis: This brother and sister love to go to the water park every day.
it is not possible to tell

Premise: During a volleyball match, one girl in white recoils and closes her eyes as the ball approaches, while the girl in black and blue seems ready to reach for the ball.

Hypothesis: During a volleyball match, one girl in white recoils and closes her eyes
yes