With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ridley Scott is not the director of the film Blade Runner.
text_B: No. 529 Squadron RAF was a radar calibration unit of the Royal Air Force during World War II .. Royal Air Force. Royal Air Force. calibration. calibration. World War II. World War II. The unit had the distinction to be the only RAF unit to fly autogyros and helicopters operationally during World War II .. World War II. World War II
not_related.