With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Oscar Robertson was born on November 24, 1938.
text_B: Carasinol B is a stilbenoid tetramer found in Caragana sinica -LRB- Chinese  : Jin Que-gen -RRB- .. tetramer. tetramer. Caragana sinica. Caragana sinica. Acid-catalyzed epimerization of kobophenol A to carasinol B can be performed in vitro .. kobophenol A. kobophenol A
not_related.