With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Zinedine Zidane is an athlete.
text_B: Sergia is a genus of plants in the Campanulaceae .. Campanulaceae. Campanulaceae. It contains two known species , both native to Central Asia .. Central Asia. Central Asia. Sergia regelii -LRB- Trautv . -RRB-. Sergia regelii. Sergia regelii. Fed .. in V.L.Komarov - Tadzhikistan. Tadzhikistan. Tadzhikistan. Sergia sewerzowii -LRB- Regel -RRB- Fed .. Sergia sewerzowii. Sergia sewerzowii. in V.L.Komarov - Kazakhstan. Kazakhstan. Kazakhstan
not_related.