With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lebanon has a capital.
text_B: Australluma is a genus of plant in family Apocynaceae .. Apocynaceae. Apocynaceae. plant. plant. Species include  :. Australluma peschii , -LRB- Nel -RRB- Plowes. Australluma peschii. Australluma peschii
not_related.