user: Question: Name the most maidens when e.r. 5.11
Columns: ['Name', 'Overs Bowled', 'Maidens', 'Runs Conceded', 'Wickets', 'Extras', 'E.R.']
Types: ['text', 'text', 'real', 'real', 'real', 'real', 'text']
Sample row: ['Brett Lee', '52.4', 6.0, 264.0, 15.0, 15.0, '5.04']
SQL:

assistant: SELECT MAX("Maidens") FROM "Table" WHERE "E.R." = '5.11';