With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Las Vegas's population did not nearly double between 1990 and 2000.
text_B: Joaquim Casimiro Junior -LRB- 30 May 1808 in Lisbon -- 28 December 1862 -RRB- was a Portuguese composer and organist .. Lisbon. Lisbon. Portuguese. Portugal. He composed a number of operas and operettas , as well as much sacred music .. sacred music. sacred music
not_related.