premise: Many people are gathered in a small park, both sitting on benches and lounging on the grass. hypothesis: A group of people gathered in a small park some sitting on benches and other lounging on the grass outside.
entailment: many people would be a group of people. some sitting on benches and others lounging on the grass is another way to say both sitting on benches and lounging on the grass. if they are on the grass, that is outside.