user: Question: what are all the positions of players who's hometown is Concord, California
Columns: ['Player', 'Position', 'School', 'Hometown', 'College']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Jonathan Allen', 'Defensive line', 'Stone Bridge High School', 'Ashburn, Virginia', 'Alabama']
SQL:

assistant: SELECT "Position" FROM "Table" WHERE "Hometown" = 'Concord, California';