premise: An older man wearing a black hat, tan jacket, and dark pants, sits in front of a lime green door. hypothesis: An old man is sitting in front of a door.
entailment: An older man could also be described as an old man - "older man" and "old man" are different phrasings of the same thing. "Sits in front of a lime green door" is a more descriptive way of saying that the man is "sitting in front of a door", and the second phrasing doesn't include any additional information that isn't given in the first.