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 professional baseball catcher and behind him an umpire are knelt in action position and are awaiting the pitch.
Hypothesis: World Series game 3 is being played
Update: They are in an empty stadium.

SOLUTION: weakener

PROBLEM: Premise: Two smiling people with dark hair.
Hypothesis: Two people are happy and smiling at a joke.
Update: They are at a comedian's performance.

SOLUTION: strengthener

PROBLEM: Premise: A group of people with instruments are standing in the middle of a street.
Hypothesis: The group of people are waiting to play music in a parade.
Update: They are wearing marching band uniforms.

SOLUTION:
strengthener