 Complete the following phrase:  Zwolsman competed in the World Sportscar Championship in 1991 finishing 6th overall in the driver standings, running his own team Euroracing with a chassis from Spice Engineering. He attempted the series again in 1992 fielding a a hrefLola20T9210Lola T9210a, but failed to score a point. However his Euroracing team finished 5th in the championship. The series folded the next year. He competed from 1990 to 1992 in the 24 Hours of Le Mans, having his best result in 