Leo: Premise: "Several people walk up and down a set of stairs in an alleyway with graffiti painted on the walls."
Hypothesis: "Grafitti is shown along the flight of stairs."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
Several people walk up and down a set of stairs with graffiti painted on the walls implies Grafitti is shown along the flight of stairs.
Thus, the answer is yes.