With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gerald Ford was President.
text_B: Mochokus niloticus is a species of upside-down catfish native to the Nile and Niger River basins .. upside-down catfish. Mochokidae. Nile. Nile. Niger River. Niger River. This species grows to a length of 6.5 cm TL .. fish measurement
not_related.