Question:  The drivers' world championship of the 1990 World Rally Championship was won by Carlos Sainz ahead of Didier Auriol and a Finnish rally driver who won how many world rallies?
Sentence (from "1990 World Rally Championship"): The drivers' world championship was won by Carlos Sainz in a Toyota Celica GT-Four ST165, ahead of Didier Auriol and Juha Kankkunen.
Relevant evidence: Yes