user: Question: What is Swimmer, when Year is less than 2011, and when Time is "53.06"?
Columns: ['Event', 'Time', 'Swimmer', 'School', 'Year']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['50 freestyle', '19.83', 'Nick Schuttinger', 'Oklahoma Baptist University', 2013.0]
SQL:

assistant: SELECT "Swimmer" FROM "Table" WHERE "Year" < 2011.0 AND "Time" = '53.06';