With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leukemia involves a lack.
text_B: The 1998 Dynasty Cup was a football competition for the top four teams of East Asia .. Dynasty Cup. Dynasty Cup. football. association football. The fourth and final edition of the Dynasty Cup was held from March 1 , 1998 , to March 7 , 1998 , in Tokyo and Yokohama , Japan .. Dynasty Cup. Dynasty Cup. Yokohama. Yokohama. Japan. Japan national football team. The competition was won by Japan for the third straight time .. Japan. Japan national football team
not_related.