With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Smoking is correlated with the occurrence of leukemia.
text_B: Gloria is a ballet created by Kenneth MacMillan in 1980 for the Royal Ballet , London .. Kenneth MacMillan. Kenneth MacMillan. Royal Ballet. Royal Ballet. Gloria. Gloria ( Poulenc ). The music is Francis Poulenc 's Gloria for soprano , chorus and orchestra -LRB- 1961 -RRB- .. Francis Poulenc. Francis Poulenc. Gloria. Gloria ( Poulenc ). The first performance was at the Royal Opera House , Covent Garden on 13 March 1980 .. Royal Opera House. Royal Opera House. Covent Garden. Covent Garden. The lead roles were danced by Wayne Eagling , Jennifer Penney , Julian Hosking and Wendy Ellis .. Wayne Eagling. Wayne Eagling. Jennifer Penney. Jennifer Penney. Julian Hosking. Julian Hosking. Wendy Ellis. Wendy Ellis. The soprano soloist was Teresa Cahill ; the conductor was Ashley Lawrence ; designs were by Andy Klunder .. Teresa Cahill. Teresa Cahill. Ashley Lawrence. Ashley Lawrence ( musician )
not_related.