With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Avengers (2012 film) was directed by Joss Whedon.
text_B: Scopalostoma nigromaculella is a moth of the Carposinidae family .. Carposinidae. Carposinidae. Scopalostoma. Scopalostoma. moth. moth. It is endemic to La Reunion in the Indian Ocean .. La Reunion. La Reunion
not_related.