Complex sentence: Luchaire left school to join the drama class of Raymond Rouleau and made her acting debut under the name Rose Davel at the age of 16 in a play written by her grandfather, "Altitude 3 200".
Split into simpler sentences: Luchaire left school to join the drama class of Raymond Rouleau. Luchaire made her acting debut under the name Rose Davel at the age of 16 in a play written by her grandfather, "Altitude 3 200".