Premise: "A man in a white jacket is on top of a roof sanding it down while standing on a wooden ledge."
Hypothesis: "A man in a white jacket standing on top of a roof sanding it down while standing on the edge of a wooden ledge outside."
Do we know that the hypothesis entailed by the premise?
Let's solve step-by-step:
If a man is on top of a roof he is also outside; if he is standing on a wooden ledge he is also on the edge of the wooden ledge. The answer is yes.