user: Question: What coach premiered February 16, 2008 later than episode 21.0?
Columns: ['Season', 'Episode', 'Episode Summary', 'Premier date', 'External Link', 'Coach']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [8.0, 7.0, 'Ashley and Jessica are made into motocross racers.', 'October 7, 2007', 'Full Episode', 'Ryan Hughes']
SQL:

assistant: SELECT "Coach" FROM "Table" WHERE "Premier date" = 'February 16, 2008' AND "Episode" > 21.0;