With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Toddler in blue shirt and beige khaki shorts and brown shoes, holding a small blue shovel, walking along beach shore with two white seagulls swooping towards him. The toddler is going to build a sandcastle.
text_B: The toddler is going to chase away the seagulls with the shovel.
weakener.