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 a beige shirt is operating a video camera next to a girl in a black sweater.
Hypothesis: The video camera is pointed at the girl.
Update: Two trapeze artists are putting on a show.

SOLUTION: weakener

PROBLEM: Premise: Lecture takes place in casual atmosphere.
Hypothesis: The lecture is lengthy.
Update: Most people had packed a lunch.

SOLUTION: strengthener

PROBLEM: Premise: A man walks a large dog past a barricaded building.
Hypothesis: The person and his pet pass a building where entry is not allowed.
Update: The building has a still open sign in the window

SOLUTION:
weakener