With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Two people are sitting outside, as a group of people on bikes stand behind them and a woman pushing a stroller with a child in it stands beside them. A group of people are outside for the annual bike-a-thon for cancer.
text_B: They watch as the 4th of July parade passes by.
weakener.