user: Question: What is the total 18-49 for the episode that aired on july 2, 2009 with more than 3.5 viewers?
Columns: ['Order', 'Episode', 'Air Date', 'U.S. Timeslot (EST)', '18-49', 'Viewers']
Types: ['real', 'text', 'text', 'text', 'real', 'real']
Sample row: [16.0, '"So I Think I Can Dance"', 'October 13, 2008', 'Monday 9:30PM', 3.1, 11.45]
SQL:

assistant: SELECT SUM("18-49") FROM "Table" WHERE "Air Date" = 'july 2, 2009' AND "Viewers" > 3.5;