With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Pembroke Castle is a structure.
text_B: Adrian Knup -LRB- born 2 July 1968 in Liestal -RRB- is a retired Swiss football striker .. Liestal. Liestal. Swiss. Switzerland. football. Association football. He was capped 49 times and scored 26 goals for the Swiss national team between 1989 and 1996 , including three games at the 1994 FIFA World Cup .. Swiss. Switzerland. Swiss national team. Switzerland national football team. 1994 FIFA World Cup. 1994 FIFA World Cup
not_related.