user: Question: Who is the Winning Driver that has a Winning team of Engstler Motorsport Engstler Motorsport and also the Date 22 July?
Columns: ['Round', 'Circuit', 'Date', 'Winning driver', 'Winning team']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1 2', 'Oschersleben', '13 May', 'Franz Engstler Franz Engstler', 'Engstler Motorsport Engstler Motorsport']
SQL:

assistant: SELECT "Winning driver" FROM "Table" WHERE "Winning team" = 'Engstler Motorsport Engstler Motorsport' AND "Date" = '22 July';