user: Question: With less than 1 Championship, what es the Established date of the Niagara Rugby Union League?
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 "Championships" < 1.0 AND "League" = 'Niagara Rugby Union';