user: Question: In how many rounds did usc participate in?
Columns: ['Round', 'Pick', 'Player', 'Position', 'College']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 7.0, 'Paul Seymour', 'Offensive Tackle', 'Michigan']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "College" = 'usc';