With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: Two men are standing outdoors on a sunny day holding pieces of a new item, possibly a small grill, while one of the men studies the assembly instructions. A man stands beside a new box of grill machine and tries to figure how to assemble it by reading through the manual
text_B: There is a propane tank nearby
strengthener.