With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mike Tyson was famous for his style of boxing.
text_B: Haxby & Gillespie was an architectural firm from Fargo , North Dakota .. North Dakota. North Dakota. R. J. Haxby and William D. Gillespie were the partners .. The firm `` produced a number of important buildings throughout North Dakota . ''. North Dakota. North Dakota. They designed many notable public , educational , commercial , and church buildings , in North Dakota , Minnesota , and Montana .. North Dakota. North Dakota. Minnesota. Minnesota. Montana. Montana
not_related.