Complex sentence: Jean-Claude Romand (born 11 February 1954) is a French murderer and impostor who pretended to be a medical doctor for 18 years before killing his family when he was about to be exposed.
Split into simpler sentences: Jean-Claude Romand (born 11 February 1954) is a French murderer and impostor who pretended to be a medical doctor. He killed his family when he was about to be exposed.