Complex sentence: Manuel Méndez Ballester was born in Aguadilla, Puerto Rico in 1909, was a well known writer and known for his works fields of journalism, radio broadcasting, television and teaching.
Split into simpler sentences: Manuel Méndez Ballester was born in Aguadilla, Puerto Rico in 1909. He was a well known writer and known for his works fields of journalism, radio broadcasting, television and teaching.