With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: With a line of trees behind him, a boy in a yellow jacket is shown jumping off a hay bale in different positions in his jump. The boy is trying to do a flip while jumping off a hay bale.
text_B: A woman's voice is overheard saying 'Be careful Tommy, that's a difficult move'
strengthener.