user: Question: Who was the winner at Rest day course?
Columns: ['Date', 'Course', 'Distance', 'Type', 'Winner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['9 May', 'Lido (Venice)', 'km (mi)', 'Team time trial', 'Team Columbia-High Road']
SQL:

assistant: SELECT "Winner" FROM "Table" WHERE "Course" = 'Rest day';