Premise: Two men are riding a blue and white jet ski.

Hypothesis: the men have a ski
yes

Premise: Children being show how things work.

Hypothesis: There are children being shown how things work.
yes

Premise: A young girl is preparing to blow on a dandelion in her hand.

Hypothesis: The girl is making a model airplane.
no

Premise: A group of children on the "Frog Hopper" ride at a fair.

Hypothesis: A bunch of kids are riding the Frog Hopper at a fair.
yes