With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Harley Quinn was a psychosomatic intern.
text_B: is a Japanese politician who served as mayor of Kobe , the capital city of Hyogo Prefecture , Japan .. Kobe. Kobe. Hyogo Prefecture. Hyogo Prefecture. He served as the mayor of the city from 1989 until 2001 .. He was also the mayor when the Great Hanshin earthquake struck Kobe in 1995 .. Kobe. Kobe. Great Hanshin earthquake. Great Hanshin earthquake
not_related.