user: Question: What wss the average round drafted for Xavier players?
Columns: ['Round', 'Pick', 'Player', 'Position', 'School']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 14.0, 'Earl Gros', 'Running Back', 'LSU']
SQL:

assistant: SELECT AVG("Round") FROM "Table" WHERE "School" = 'Xavier';