Premise: "Several people are milling about outside a large off-white colored house with a terra cotta roof while someone in the distance takes their picture."\nHypothesis: "Family walking in on party."\nDo we know that the hypothesis entailed by the premise?
Let's be accurate as possible and think first.
no
People walking in somewhere in a group is different than a group milling around.

.

The answer is no