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: There are a lot of kids walking on train tracks surrounded by trees.
Hypothesis: THE grass was green
Update: The yellow grass was a result of the drought that had hit the area.

SOLUTION: weakener

PROBLEM: Premise: 3 team members, wearing 3 uniforms, are jumping towards the volleyball nets to block an opposing teams, wearing a yellow uniforms, spike.
Hypothesis: they are playing volleyball for the championship
Update: The teams are playing more intensely than they have before.

SOLUTION: strengthener

PROBLEM: Premise: A man and a woman that is holding flowers smile in the sunlight.
Hypothesis: A couple smile on the bench.
Update: A woman takes a photo of the two posing for a magazine

SOLUTION:
weakener