Premise: A teacher pointed out the Library details on the overhead projector screen.

Hypothesis: A teacher went over Library details.
yes

Premise: A man and boy sitting cross-legged on ground inspecting barbecue grill.

Hypothesis: The men are looking at a grill.
yes

Premise: A woman in blue jeans looks upon the group of birds and buses in the background.

Hypothesis: A mother is waiting for her husband
it is not possible to tell

Premise: Several dancers with tight black pants, skirts, and colorful scarves dance.

Hypothesis: Several dancers are wearing black shirts.
it is not possible to tell