user: Question: What is the College of Rice's highest overall for the Guard position?
Columns: ['Round', 'Pick #', 'Overall', 'Name', 'Position', 'College']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 1.0, 1.0, 'Tommy Nobis', 'Linebacker', 'Texas']
SQL:

assistant: SELECT MAX("Overall") FROM "Table" WHERE "Position" = 'Guard' AND "College" = 'Rice';