premise: People in motion down a city sidewalk. hypothesis: People walk down a sidewalk.
entailment: There's a good reason it's called "sidewalk" - because when people are 'in motion' down one, it's perfectly ordinary to assume that the form of motion is walking.|entailment: "Being in motion down a sidewalk" means walking down a sidewalk.|entailment: Walking down the sidewalk could be described as being in motion.