instruction:
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.
question:
Premise: A group of black boys in a classroom setting wearing white shirts, listening to a speech about UNICEF.
Hypothesis: A group of high school students hear about the advantages of donating to UNICEF.
Update: The boys' teacher used to work for UNICEF.
answer:
strengthener


question:
Premise: A man is helping another man after a fall on the street.
Hypothesis: The man is his brother.
Update: The men look almost identical to each other.
answer:
strengthener


question:
Premise: Girl wearing a hat and holding her bike talks to her friend.
Hypothesis: Girl holding her bike is talking to her friend with black hair.
Update: the friend has a bright red bow which stands out very much against her jet black hair
answer:

strengthener