With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Saint Peter was excommunicated from the Catholic church.
text_B: `` Togetsukyo -LRB- Kimi Omou -RRB- '' is a song by Japanese singer-songwriter Mai Kuraki .. Mai Kuraki. Mai Kuraki. singer-songwriter. singer-songwriter. It was released on April 12 , 2017 by Northern Music on physical format and April 19 , 2017 on digital format .. Northern Music. Northern Music. The song was written by Kuraki and her long-time collaborator Akihito Tokunaga and serves as the theme song to the 2017 film Detective Conan  : Crimson Love Letter .. Akihito Tokunaga. Akihito Tokunaga
not_related.