With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tipper Gore was born in August 1948.
text_B: Diaphorus oculatus is a species of fly in the family Dolichopodidae .. Dolichopodidae. Dolichopodidae. Diaphorus. Diaphorus. It is found in the Palearctic .. Palearctic. Palearctic
not_related.