user: Question: What is average Overall, when Pick is 19?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 20.0, 20.0, 'Mark May', 'OT', 'Pittsburgh']
SQL:

assistant: SELECT AVG("Overall") FROM "Table" WHERE "Pick" = 19.0;