With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lyndon B. Johnson threw out the Voting Rights Act.
text_B: Nguyen Thi Le Dung -LRB- born September 9 , 1985 -RRB- is a Vietnamese fencer .. fencer. fencing. She competed at the 2016 Summer Olympics in the women 's sabre event , in which she was eliminated in the round of 32 by Kim Ji-yeon .. 2016 Summer Olympics. 2016 Summer Olympics. Kim Ji-yeon. Kim Ji-yeon
not_related.