user: Question: What is the average Tournaments, when Highest Rank is "Maegashira 1"?
Columns: ['Name', 'Tournaments', 'Pro Debut', 'Top division debut', 'Highest rank']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Jōkōryū', 9.0, 'May 2011', 'November 2012', 'Maegashira 7']
SQL:

assistant: SELECT AVG("Tournaments") FROM "Table" WHERE "Highest rank" = 'Maegashira 1';