With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Chess has a regulated regional playoff.
text_B: Eryngium alpinum -LRB- alpine sea holly , alpine eryngo or queen of the Alps -RRB- is a perennial herb in the family Apiaceae .. Apiaceae. Apiaceae. Eryngium. Eryngium. perennial herb. perennial plant. family. family ( biology )
not_related.