Table:
text: Danish Grand Prix
Winners of the Danish Grand Prix
Winners of the Danish Grand Prix
Year_ Driver Constructor_ Location_ Formula Report
1975 Jac Nelleman GRD - Ford Jyllandsringen Formula 3 Report
1976 Jac Nelleman Van Diemen - Toyota Jyllandsringen Formula 3 Report
1977 Jac Nelleman Chevron - Toyota Jyllandsringen Formula 3 Report
1995 Toni Teittinen Reynard - Mugen - Honda Jyllandsringen Formula 3 Report

Question: What was the constructor among the 1975 Danish Grand Prix?