user: Question: The Graduate Assistant who was in the 1st year at CU has what experience?
Columns: ['Position', 'Name', 'Year at CU', 'Experience', 'Alma Mater']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Head Coach', 'Oliver Purnell', '6th', 31.0, "Old Dominion ('75)"]
SQL:

assistant: SELECT "Experience" FROM "Table" WHERE "Year at CU" = '1st' AND "Position" = 'Graduate Assistant';