Premise: Two men on horses look on as another man is bucked off the back of his horse.

Hypothesis: Two men on horses look on as another man is bucked off.
Relation: entailment

Hypothesis: Two men on horses look on as another man is bucked off the back of his red horse.
Relation: neutral

Hypothesis: Two women on horses look on as another man is bucked off the back of his horse.
Relation: contradiction