With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Overwatch is a sport.
text_B: 1100s may refer to  :. The period from 1100 to 1199 , almost synonymous with the 12th century -LRB- 1101 -- 1200 -RRB-. 12th century. 12th century. The period from 1100 to 1109 , known as the 1100s decade. 1100s decade. 1100s ( decade )
not_related.