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: Man with no shirt and woman wearing all black are running in the sand.
Hypothesis: The people are at the beach.
Update: They are running to a cactus.

SOLUTION: weakener

PROBLEM: Premise: Two girls are standing behind another girl.
Hypothesis: Two girls are preparing to push a third girl.
Update: the third girl is on the top stair

SOLUTION: weakener

PROBLEM: Premise: Two elderly people sit in handicapped chairs on a train.
Hypothesis: Two people are on a long train ride.
Update: They are being served a bag of snacks.

SOLUTION:
weakener