user: Question: Which Level has a League Contested of Northern Premier League Premier Division, and a Season of 2011–12?
Columns: ['Season', 'LeagueContested', 'Level', 'LeaguePosition', 'Avg.Home Attendance 1', 'FA Cup', 'FA Trophy', 'Leading scorer 1']
Types: ['text', 'text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2005–06', 'North West Counties League Division Two', 10.0, '1st of 19 Promoted', '3,056', 'n/a', 'n/a', 'Rory Patterson 18']
SQL:

assistant: SELECT "Level" FROM "Table" WHERE "LeagueContested" = 'Northern Premier League Premier Division' AND "Season" = '2011–12';