user: Question: Who was the winning team on May 12?
Columns: ['Round', 'Date', 'Event', 'Circuit', 'Winning Driver', 'Winning Team']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'May 12', 'Belgian Grand Prix', 'Circuit Zolder', 'Elio de Angelis', 'Squadra Osella Corse']
SQL:

assistant: SELECT "Winning Team" FROM "Table" WHERE "Date" = 'May 12';