Premise: A man is riding a dirt bike.

Hypothesis: A man riding a bike.
yes

Premise: A group of people looking at a field of greenery.

Hypothesis: The people are visiting Gettysburg National Civil War site.
it is not possible to tell

Premise: A man is in midair doing an elaborate trick on a snowboard on a snowy hillside.

Hypothesis: A man watches the Olympics on TV.
no

Premise: A woman in a white shirt stands at the entrance of an ethnic goods shop.

Hypothesis: A woman in a white shirt stands in the city.
yes