Stream of consciousness rationale: It can either be pink and purple balloons or blue and green balloons.
The question and answer pair are described below.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Q: Premise: "Pink and purple balloons outside of a building."
Hypothesis: "Blue and green balloons are floating in the sky."
Do we know that the hypothesis entailed by the premise?
A: no