premise: A boy jumps into a not-so-crowded public pool. hypothesis: There is a boy who jumps into a not-so-crowded public pool.
entailment: A boy jumps into a not-so-crowded public pool, would not be There is a boy who jumps into a not-so-crowded public pool would not be  There is a boy who jumps into a not-so-crowded public pool.