Complex sentence: He initially worked with pianist and college friend Roland Pontinen and local composer Jan Sandstrom and early fame came with the notorius "Motorbike Concerto" which involves all the sounds of a motorbike from revving, gear changes, skidding and a complete story told through the trombone.
Split into simpler sentences: He initially worked with pianist and college friend Roland Pontinen and local composer Jan Sandstrom. Early fame came with Sandstrom's notorius "Motorbike Concerto", which involves all the sounds of a motorbike from revving, gear changes, skidding and a complete story told through the trombone.