With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Kendrick Lamar signed his first contract with Top Dawg Entertainment.
text_B: Gu Yuting -LRB- ; born January 14 , 1995 -RRB- is a Chinese table tennis player .. table tennis. table tennis. She won a gold medal in the Women 's singles event at the 2010 Summer Youth Olympics .. 2010 Summer Youth Olympics. 2010 Summer Youth Olympics. In addition , Gu holds the distinction of having competed at the World Junior Table Tennis Championships for 5 straight years -LRB- 2009 -- 13 -RRB- and winning the World Junior Girls ' Doubles title on all 5 occasions .. Doubles. World Junior Table Tennis Championships
not_related.