With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Machine Gun Kelly (rapper) released an album in 2012.
text_B: William Bartlett Fletcher Sr. -LRB- 1862 - June 29 , 1957 -RRB- was a Rear Admiral in the United States Navy .. Rear Admiral. Rear Admiral. United States Navy. United States Navy
not_related.