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: People in speed rafts drive in the water.
Hypothesis: People are racing.
Update: The rafts are travelling in opposite directions.

SOLUTION: weakener

PROBLEM: Premise: Multiple people are hanging on to a pole while bystanders observe the event.
Hypothesis: They are acrobats.
Update: The people are in a large tent

SOLUTION: strengthener

PROBLEM: Premise: Two people in front of a crowd who are wearing Native American robes and accessories.
Hypothesis: Two karate masters prepare for a fight.
Update: They are at a powwow.

SOLUTION:
weakener