premise: Two people walking down a narrow alley with large buildings on each side. hypothesis: Two people are walking down an alley.
entailment: Large buildings are on each side of an alley.|entailment: Narrow alley is a type of alley, and walking down is a paraphrase of are walking down.|entailment: Sentance 2 is a restatement of Sentance 1 so two people are walking down an alley.