With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: William McKinley served as the 25th US president from March 4, 1897 until his death.
text_B: As of January 1 , 2011 , The Church of Jesus Christ of Latter-day Saints reported 8,907 members in two districts , 23 branches , and one mission , in Sierra Leone .. The Church of Jesus Christ of Latter-day Saints. The Church of Jesus Christ of Latter-day Saints. districts. District ( Latter Day Saints ). branches. Ward ( LDS Church )#Branch. mission. Mission ( LDS Church ). Sierra Leone. Sierra Leone
not_related.