Complex sentence: DIC was founded in Paris in 1971 by Frenchman Jean Chalopin as DIC Audiovisuel, a subsidiary of RTL Group (RTL) which was also Europe's leading entertainment company at the time.
Split into simpler sentences: DIC was founded in Paris in 1971 by Frenchman Jean Chalopin. It was also known as DIC Audiovisuel, a subsidiary of RTL Group (RTL) which was also Europe's leading entertainment company at the time.