user: Question: What position is played by pick 255 overall?
Columns: ['Round', 'Choice', 'Overall', 'Player name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 3.0, 3.0, 'Jim Dunaway', 'Defensive Tackle', 'Mississippi']
SQL:

assistant: SELECT "Position" FROM "Table" WHERE "Overall" = 255.0;