With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: In a crowd at a stadium, one man is standing up by himself with his arms up over his head like he's doing the Wave. In a crowd at a football game, one man is standing up by himself with his arms up over his head like he's doing the wave
text_B: The man catches a baseball on the fly.
weakener.