With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Eight people in red and black clothing, carrying large red packs cross a footbridge over a clear blue and white river with a large canyon and mountain range in the background. Each of the eight people dressed in matching red and black suits, grasp tightly to the rails on the footbridge as the whitewater rapids raged below them.
text_B: There is a safety net below the footbridge.
weakener.