With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Phil Mickelson competed in a golf championship.
text_B: The mottle-faced tamarin -LRB- Saguinus inustus -RRB- is a species of tamarin from South America .. Saguinus. Saguinus. species. species. tamarin. tamarin. South America. South America. It is found in Brazil and Colombia .. Brazil. Brazil. Colombia. Colombia
not_related.