With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lymelife is set in 1970's Long Island.
text_B: The 1910 Kentucky Derby was the 36th running of the Kentucky Derby .. Kentucky Derby. Kentucky Derby. The race took place on May 10 , 1910 .. Horse Eye White scratched before the race .
not_related.