Complex sentence: Born the son of Polish immigrants, he grew up in the Plateau-Mont-Royal district of Montreal, where he attended Baron Byng High School and between 1949 and 1959 was a commercial artist, while writing hundreds of scripts for CBC radio and TV.
Split into simpler sentences: Born the son of Polish immigrants, he grew up in the Plateau-Mont-Royal district of Montreal, where he attended Baron Byng High School. Between 1949 and 1959 he worked as a commercial artist, while writing hundreds of scripts for CBC radio and TV.