user: Question: During round 8 when the Position being picked was RB, what was the highest overall pick?
Columns: ['Round', 'Pick', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [2.0, 28.0, 55.0, 'Chip Lohmiller', 'K', 'Minnesota']
SQL:

assistant: SELECT MAX("Overall") FROM "Table" WHERE "Position" = 'RB' AND "Round" = 8.0;