Complex sentence: While in college, he made friends with record producer Skread, who had worked with Diam's, Booba, Rohff, Nessbeal, as well as collaborating with Gringe in his initial works and forming the duo Casseurs Flowters with him in 2004.
Split into simpler sentences: While in college, he made friends with record producer Skread, who had worked with Diam's, Booba, Rohff and Nessbeal. He also collaborated with Gringe in his initial works and formed the duo Casseurs Flowters with him in 2004.