With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Margot Frank was Anne Frank's older brother.
text_B: Emmanuel Ndiemandoi -LRB- born 1953 -RRB- is a Tanzanian long-distance runner .. long-distance runner. long-distance track event. He competed in the marathon at the 1980 Summer Olympics .. marathon. Athletics at the 1980 Summer Olympics – Men's marathon. 1980 Summer Olympics. 1980 Summer Olympics
not_related.