Premise: a lady is wearing all black with a whistle in the middle of rollerskaters.

Hypothesis: She is refereeing a football game.
no

Premise: A boy writes a letter to Santa.

Hypothesis: A boy is writing to an old man.
yes

Premise: A happy couple sitting together.

Hypothesis: A happy couple sitting together in the bottom of the ocean.
no

Premise: A man is fixing a bicycle for another man in the snow.

Hypothesis: A bike ride on the sandy beach is halted by a flat tire.
no