With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Robin Thicke has worked with a singer.
text_B: The streamer-tailed tyrant -LRB- Gubernetes yetapa -RRB- is a species of bird in the family Tyrannidae , the only one in the genus Gubernetes .. Tyrannidae. Tyrannidae. bird. bird. genus. genus. It is found in Argentina , Bolivia , Brazil , and Paraguay .. Argentina. Argentina. Bolivia. Bolivia. Brazil. Brazil. Paraguay. Paraguay. Its natural habitats are dry savanna and subtropical or tropical seasonally wet or flooded lowland grassland .. savanna. savanna. grassland. grassland
not_related.