With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Blackhat stars Chris Hemsworth and it did well at the box office.
text_B: In October 1917 Nieuport began construction of a prototype monoplane fighter known as the Nieuport Madon , a strut braced monoplane .. Nieuport. Nieuport. monoplane. monoplane
not_related.