premise: A group of three people and one dog hike up a green mountainside. hypothesis: Some people are exercising outside.
entailment: 'Three people' can also be described collectively as 'some people', a hike up a mountainside is a form of exercising and also indicates they are outside.|entailment: Some people make up a group and hiking a mountain is exercising outside.|entailment: A group of people is some people, a hike is exercising, and a mountainside is outside.