Premise: "A cat is watching a girl construct a lego airplane."\nHypothesis: "A cat is watching a girl build a airplane and throw it across the room."\nDo we know that the hypothesis entailed by the premise?
Let's be accurate as possible and think first.
it is not possible to tell
Construct an airplane does not imply to throw it across the room.

.

Therefore, the answer is it is not possible to tell