With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A man in a yellow shirt and blue pants balances himself on a log behind another man in a light blue shirt and shorts that are light blue and yellow that is also balancing himself. Two men are practicing for a log roll
text_B: another man spurs them on and the crowd cheers to see who can balance longest
weakener.