TASK DEFINITION: In this task, you are given a premise, a hypothesis, and an update. The premise sentence describes a real-world situation and is always assumed to be true. The hypothesis sentence describes an assumption or inference that you might make about that situation having read the premise. The update provides additional information about the situation that might weaken or strengthen the hypothesis. A weakener is a statement that weakens the hypothesis, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.
PROBLEM: Premise: In the foreground, a soccer player wearing orange and black moves to intercept two players wearing white uniforms as they run towards the camera in pursuit of the soccer ball while in the background a man in a blue soccer uniform looks on.
Hypothesis: As a soccer player moves to intercept, he is making a foul on the play.
Update: The player he is running towards falls to the ground.

SOLUTION: strengthener

PROBLEM: Premise: A young african boy skipping rocks.
Hypothesis: There is a rock currently skipping down a pond.
Update: There are several expanding sets of rings on the surface of the pool.

SOLUTION: strengthener

PROBLEM: Premise: A woman wearing a blue top, brushes the hair of another woman, wearing a green top.
Hypothesis: woman to help brush the another woman
Update: The woman in blue is a professional hair dresser.

SOLUTION:
strengthener