Leo: Premise: "A sidewalk artist wearing a black hoodie is creating a large installation of a woman on the sidewalk while being watched by many by-standers."
Hypothesis: "An artist unveils his newest project in preparation for an art event."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
A sidewalk artist creating a large installation does not necessarily imply unveils his newest project and does not necessarily imply in preparation for an art event.
Thus, the answer is it is not possible to tell.