With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bruno Mars's musical performing group involves background singers and background dancers.
text_B: Viktor Aleksandrovich Kuznetsov -LRB- Виктор Александрович Кузнецов , born May 21 , 1961 -RRB- is a former backstroke swimmer from the Soviet Union .. backstroke. backstroke swimming. swimmer. swimmer. Soviet Union. Soviet Union. He won two silver medals at the boycotted 1980 Summer Olympics in Moscow , USSR .. 1980 Summer Olympics. 1980 Summer Olympics. Moscow. Moscow. USSR. USSR
not_related.