With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Philip V of Spain had a long reign.
text_B: Karl Muller -LRB- born 1952 in Roggwil TG -RRB- is a Swiss engineer and businessman .. Roggwil TG. Roggwil TG. Swiss. Swiss. engineer. engineer. businessman. businessman. He is the creator of the Masai Barefoot Technology brand of rocker bottom shoes , and holds a patent on his design .. Muller founded Swiss Masai -LRB- now known as Masai Marketing and Trading AG -RRB- in 1996 to market his new shoe concept .. Swiss. Swiss. In 2007 , he left the company on amicable terms and went on to found kybun Corporation in order to market a newer `` walk-on-air '' shoe concept .
not_related.