user: Question: What class was the 2nd - Portillo?
Columns: ['Result', 'Date', 'Race', 'Venue', 'Distance', 'Class', 'Weight (kg)', 'Time', 'Jockey', 'Odds', 'Winner/2nd']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1st', '12/03/08', 'Wattle Grove Handicap', 'Kensington', '1150m', 'Handicap', '54.5kg', '1-07.95', 'Hugh Bowman', '$1.75F', '2nd - Packing Supreme']
SQL:

assistant: SELECT "Class" FROM "Table" WHERE "Winner/2nd" = '2nd - Portillo';