With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ronin is a 1998 American spy film.
text_B: NOTOC. The Avia BH-17 was a biplane fighter aircraft built in Czechoslovakia in 1924 .. biplane. biplane. fighter aircraft. fighter aircraft. Czechoslovakia. Czechoslovakia. It was a development of the BH-6 and BH-8 , and work on the latter aircraft was cut short in favour of this one .. BH-6. Avia BH-6. BH-8. Avia BH-8. Operational trials in 1924 revealed performance good enough for the Czech Air Force to place an order for 24 examples .. Czech Air Force. Czech Air Force. In actual service , however , the BH-17 proved unreliable and was soon withdrawn .
not_related.