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: A group of little girls jumping together in a backyard.
Hypothesis: A group of girls are laughing.
Update: The girls are alone with one another and they are not being told what to do by anyone

SOLUTION: strengthener

PROBLEM: Premise: Several people standing in the street.
Hypothesis: people were waiting for the light to change so they could cross
Update: The police officer was holding them up with his hand.

SOLUTION: strengthener

PROBLEM: Premise: Bike riding in the square.
Hypothesis: People are riding bikes for a charity.
Update: Each rider wears a shirt that says 'Save the Children'.

SOLUTION:
strengthener