Question: Which sumos have nore than 7 championship wins ?
Answers:
answer_text: Hakuhō
answer_text: Taihō
answer_text: Akebono
answer_text: Wakanohana I
answer_text: Hokutoumi
answer_text: Raiden
answer_text: Tanikaze
answer_text: Kashiwado
answer_text: Inazuma
answer_text: Umegatani I