With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: John D. Rockefeller has a sibling.
text_B: Marketa Jerabkova -LRB- born 8 February 1996 -RRB- is a Czech handballer for DHK Banik Most and the Czech Republic national team .. Czech Republic. Czech Republic women's national handball team. DHK Banik Most. DHK Banik Most. Czech Republic national team. Czech Republic women's national handball team
not_related.