With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A man plays electric guitar on his knees. Jimi Hendrix wowed the crowd yet again, dropping to his knees before finally setting his guitar on fire.
text_B: Over 50 years later, people still talk about how Jimi Hendrix wowed the crowd yet again, dropping to his knees before finally setting his guitar on fire.
strengthener.