user: Question: What is the average number of rounds for Billy Hicks who had an overall pick number bigger than 310?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 12.0, 12.0, 'Ed Vereb', 'HB', 'Maryland']
SQL:

assistant: SELECT AVG("Round") FROM "Table" WHERE "Overall" > 310.0 AND "Name" = 'Billy Hicks';