Complex sentence: Maria Celestina Fernandes (born 12 September 1945) is an Angolan author mostly of children's books, but also of poetry and short stories, and who had earlier careers as a social worker and lawyer.
Split into simpler sentences: Maria Celestina Fernandes (born 12 September 1945) is an Angolan children's author. She has also written poetry and short stories, and had earlier careers as a social worker and lawyer.