With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bradley Cooper had a guest role on an American romantic comedy television series.
text_B: The Hongdae is a region in Seoul , South Korea near Hongik University , after which it is named .. Seoul. Seoul. South Korea. South Korea. Hongik University. Hongik University. It is known for its urban arts and indie music culture , clubs and entertainments .. indie music. indie music. The area is located in Mapo-gu in the western end of Seoul , stretching from Seogyo-dong to Hapjeong-dong .. Seoul. Seoul. Mapo-gu. Mapo-gu. Seogyo-dong. Seogyo-dong. Hapjeong-dong. Hapjeong-dong
not_related.