With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A bunch of people in wheelchairs are pushing one another, while a man takes a picture of them. A bunch of people in wheelchairs are pushing one another, while a man takes a picture of them as they compete in a tournament
text_B: There is a crowd watching as the people roll in to a large gym.
strengthener.