user: Question: What round was the draft pick of tight end with an Overall larger than 21?
Columns: ['Round', 'Overall', 'Player', 'Position', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 21.0, 'Daniel Graham', 'Tight end', 'Colorado']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Position" = 'tight end' AND "Overall" > 21.0;