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: An African American man smiling.
Hypothesis: The man is showing his teeth to a doctor.
Update: The man is knocking on a door
answer:
weakener


question:
Premise: Girl walking her horse across the street.
Hypothesis: The horse has a saddle on his back.
Update: The girl is taking the horse to a barn for the night
answer:
weakener


question:
Premise: A bike rider in red rides through the trees down a snowy hill.
Hypothesis: A biker rides down a steep hill.
Update: The biker has to keep tapping his brakes to avoid going too fast.
answer:

strengthener