Premise: Friends gathered around playing a music video game.

Hypothesis: The friends are having a good time.
it is not possible to tell

Premise: One dog chases another in the grass.

Hypothesis: The dogs always play together.
it is not possible to tell

Premise: A man in black holds up an Obama 08 sign.

Hypothesis: A man is holding an Obama sign.
yes

Premise: An man with a green shirt and white shorts is playing volleyball.

Hypothesis: The man was getting ready for the volley ball competition.
it is not possible to tell