user: Question: What is the number that is the lowest overall for Round 6?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 17.0, 17.0, 'Bobby Wilson', 'DT', 'Michigan State']
SQL:

assistant: SELECT MIN("Overall") FROM "Table" WHERE "Round" = 6.0;