user: Question: João Barbosa was the winner of which event?
Columns: ['Date', 'City', 'Event', 'Winner', 'Prize']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['10–14 September 2008', 'Barcelona', 'EPT Barcelona Open', 'Sebastian Ruthenberg', '€1,361,000']
SQL:

assistant: SELECT "Event" FROM "Table" WHERE "Winner" = 'João Barbosa';