With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A person with hat, long shirt, and jeans is standing in a stand of trees with no underbrush, bent over and examining the base of a tree, while a footpath crosses the bottom of the image. The fully dressed man is standing off the path in a clump of trees.
text_B: Leaves and nuts are falling on the man's head.
strengthener.