Premise: Large group of young kids gather around as one of the young children does a back flip as a demonstration for everyone.

Hypothesis: A group of kids do back flips in unison while one kid watches.
Relation: contradiction

Hypothesis: A group of kids watch another kid do a back flip.
Relation: entailment

Hypothesis: A bunch of young kids gather around while one young kid does a back flip for everyone to see.
Relation: entailment