With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Billy Clanton died on October 26th, 1881 from a gunshot wound.
text_B: Grey kangaroo is a kangaroo that is gray .. kangaroo. kangaroo. gray. gray. Species are  :. Eastern grey kangaroo -LRB- Macropus giganteus -RRB-. kangaroo. kangaroo. Eastern grey kangaroo. Eastern grey kangaroo. Western grey kangaroo -LRB- Macropus fuliginosus -RRB-. kangaroo. kangaroo. Western grey kangaroo. Western grey kangaroo. Category  : Former disambiguation pages converted to set index articles
not_related.