With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Anorexia nervosa is characterized by a lot of weight.
text_B: The 1999 Asian Speed Skating Championships were held between 9 January and 10 January 1999 at M-Wave in Nagano , Japan .. M-Wave. M-Wave. Nagano. Nagano, Nagano. Japan. Japan
not_related.