Premise: The Volkswagen Golf Mk4 (or VW "Typ 1J") is a compact car, the fourth generation of the Volkswagen Golf and the successor to the Volkswagen Golf Mk3. Launched in October 1997, it was the best selling car in Europe in 2001 (though it slipped to second place, behind the Peugeot 206, in 2002).
Hypothesis: In 2001 the Volkswagen Golf Mk4 was the best selling car in Europe.