user: Question: Which Overall is the highest one that has a Name of daimon shelton, and a Round larger than 6?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 21.0, 21.0, 'Renaldo Wynn', 'Defensive Tackle', 'Notre Dame']
SQL:

assistant: SELECT MAX("Overall") FROM "Table" WHERE "Name" = 'daimon shelton' AND "Round" > 6.0;