With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Football players in blue and yellow uniforms, with orange numbers, are trying to keep the ball from the approaching players, dressed in white uniforms with red numbers. One football team has just kicked a ball near the other team and are frantically trying to recover before time runs out.
text_B: The crowd is screaming.
strengthener.