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 blue t-shirts stand in the grass.
Hypothesis: People in blue t-shirts stand around talking about their lives.
Update: They are looking at pictures of one another's vacations on their smartphones.

SOLUTION: strengthener

PROBLEM: Premise: Six people planting a garden.
Hypothesis: The family is working to plant tomatoes, potatoes, and lettuce in their newly hoed garden.
Update: The people are various ages.

SOLUTION: strengthener

PROBLEM: Premise: A woman in a sleeveless shirt grins in the direction of the man in the adjoining plush bus seat.
Hypothesis: The man just said something funny.
Update: The man is a comedian.

SOLUTION:
strengthener