With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A woman leaning over to help a child in a stroller with a man laying down on a park bench and another sitting on a bench. A woman takes her child for a stroll through the park while some people rest on benches in the shade.
text_B: The people squint because of the bright sunlight.
weakener.