With no explanation, label text_A→text_B with either "strengthener" or "weakener".
text_A: A young girl wearing a light blue dress and a young boy wearing navy pants and a yellow shirt walk up the steps to the cockpit of an airplane sitting in the field of an aviation museum. A brother and sister are walking up the steps to an old silver airplane.
text_B: The plane was used during World War II.
strengthener.