With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Steffi Graf was ranked No.1 in the world during her career.
text_B: Tweenies  : Doodles ' Bones is an action game developed by Tiertex Design Studios and published by BBC Multimedia for the Game Boy Color in 2001 .. Tiertex Design Studios. Tiertex Design Studios. BBC Multimedia. BBC Multimedia. Game Boy Color. Game Boy Color. It consists of 9 minigames , four games are respective to the four main characters  : Bella , Fizz , Milo and Jake and the other five are respective to the different modes on the Tweenie Clock -LRB- Song Time , Messy Time , Telly Time , Story Time and News Time -RRB- .. Category  : Video games based on television series. Category  :2001 video games. Category  : Game Boy Color games. Game Boy Color. Game Boy Color. Category  : Europe-exclusive video games
not_related.