With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Katie Holmes was in Arthur Miller's All My Sons.
text_B: The Bolgrad palace bombing occurred on 13 December 1921 when a bomb was thrown into Siguranta palace located in Bolgrad , Romania , resulting in the deaths of 100 soldiers and police officers .. Bolgrad. Bolgrad. Romania. Romania. Siguranta. Siguranta. Bessarabian separatists were suspected .
not_related.