Complex sentence: She began her career in 1983 as a poet, but soon turned to prose; she is especially known for her novels, especially those with dark undertones, but she has also written plays and short stories, as well as continuing to write poetry.
Split into simpler sentences: She began her career in 1983 as a poet, but soon turned to prose. She is known for her novels' dark undertones, but she has also written plays and short stories, as well as continuing to write poetry.