With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Oh Yeon-seo birth date is in the 20th century.
text_B: Dragonite International Limited , formerly Ruyan , is a pharmaceutical company in Hong Kong .. Dragonite International Limited. Dragonite International Limited. Ruyan. Ruyan. Ruyan may also refer to  :. Ruyan. Ruyan. Royan , Iran , a city in Mazandaran Province , Iran. Ruyan , Semnan , a village in Semnan Province , Iran. Ruyan. Ruyan. Ruyan , West Azerbaijan , a village in West Azerbaijan Province , Iran. Ruyan. Ruyan
not_related.