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 man in costume drums in a parade.
Hypothesis: There is a man playing drums on a float.
Update: The man is marching with the rest of his band.

SOLUTION: weakener

PROBLEM: Premise: Two males are laying their head down in a restaurant.
Hypothesis: The men are sleepy.
Update: They just worked a 12 hour shift.

SOLUTION: strengthener

PROBLEM: Premise: A young girl wearing a light blue dress and a young boy wearing navy pants and a yellow shirt walk up the steps to the cockpit of an airplane sitting in the field of an aviation museum.
Hypothesis: A brother and sister are walking up the steps to an old silver airplane.
Update: Both the boy and girl refer to the same woman as "mom."

SOLUTION:
strengthener