With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jousting remained unpopular with nobility of Wales throughout the whole of the 16th century.
text_B: The Garita Creek Formation is a Mesozoic geologic formation in New Mexico .. Mesozoic. Mesozoic. formation. Formation ( geology ). New Mexico. New Mexico. Dinosaur remains are among the fossils that have been recovered from the formation , although none have yet been referred to a specific genus .. formation. Formation ( geology ). Dinosaur. Dinosaur. genus. genus
not_related.