With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A young man wearing shorts, sandals, and a red shirt, stands next to a downed tree, blocking a path. The young man is standing next to a downed tree using a chainsaw so that bikers can use the bike path today.
text_B: The man does not have a way to power the chainsaw.
weakener.