 Complete the following phrase:  In the 1987 summer, A.C. Milan bought Ruud Gullit from PSV Eindhoven for a world-record transfer fee 6,000,000, and that money was soon used in the acquisition of Gillhaus, Wim Kieft and Søren Lerby. The former netted 15 goals in only 26 games in his first season, helping the Philips club to an historic treble  he appeared 105 minutes in the campaigns European Cup 