Complex sentence: Duval and Engel were unable to participate in the Paris ePrix because of a Deutsche Tourenwagen Masters commitment at the EuroSpeedway Lausitz and were replaced by Conway and Formula V8 3.5 Series champion Tom Dillmann.
Split into simpler sentences: Duval and Engel were unable to participate in the Paris ePrix because they were committed to participating in the Deutsche Tourenwagen Masters round at the EuroSpeedway Lausitz. They were replaced by Conway and Formula V8 3.5 Series champion Tom Dillmann.