Premise: "A young man wearing a black shirt and a young lady also wearing a black shirt are rollerblading outside."
Hypothesis: "A boyfriend and girlfriend race to the finish line they previously agreed upon."
Do we know that the hypothesis entailed by the premise? Let's be accurate as possible and think first.
A young man and lady together aren't always boyfriend and girlfriend. Not everyone rollerblading is in a race. Final answer: it is not possible to tell.