Premise: A woman who appears to be a student, laughs at something that her male companion does n't seem to find amusing.

Hypothesis: A man and woman are both laughing because their friend didn't get the joke they told him.
Relation: contradiction

Hypothesis: A woman is laughing while her companion is not because he doesn't find it funny.
Relation: neutral

Hypothesis: A woman, possibly a student, laughs at something that her male companion does not find funny.
Relation: entailment