user: Question: What is Time, when Year is greater than 2011, and when Event is "800 freestyle relay"?
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 "Time" FROM "Table" WHERE "Year" > 2011.0 AND "Event" = '800 freestyle relay';