With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Just Dance was put out in April 2008.
text_B: Radequinil -LRB- INN ; AC-3933 -RRB- is a cognitive enhancer which acts as a partial inverse agonist of the benzodiazepine site of the GABAA receptor .. INN. International Nonproprietary Name. cognitive enhancer. cognitive enhancer. inverse agonist. inverse agonist. benzodiazepine site. benzodiazepine site. It was under development by Dainippon Sumitomo Pharma for the treatment of Alzheimer 's disease and made it to phase II clinical trials but development seems to have been halted and it was never marketed .. Dainippon Sumitomo Pharma. Dainippon Sumitomo Pharma. phase II. phases of clinical research
not_related.