user: Question: What is the Established date of the ontario provincial junior a hockey League with more than 1 Championship?
Columns: ['Club', 'League', 'Venue', 'Established', 'Championships']
Types: ['text', 'text', 'text', 'real', 'real']
Sample row: ['Hamilton Croatia', 'Canadian Soccer League', 'Brian Timmis Stadium', 1957.0, 1.0]
SQL:

assistant: SELECT "Established" FROM "Table" WHERE "League" = 'ontario provincial junior a hockey' AND "Championships" > 1.0;