premise: A man's head protrudes from one of a series of small shuttered windows set into a wall. hypothesis: A man's head pokes out from a group of small windows in a wall outside.
entailment: Protrudes is a synonym for poke. Series is a synonym for group. If a man's head protrudes from a series of windows, then it is the same as if the man's head pokes out from a group of windows.