With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Two men; one with a red shirt and solid red ball, and the other with a black shirt and a purple striped ball, getting ready to take a pool shot on a pool table. Two men are competing in a pool competition for $100
text_B: One of the men is teaching the other how to line up his shots.
weakener.