Complex sentence: Born to parents who emigrated from Spain, Greer graduated from the Christopher Columbus High School then from the University of Florida with a BS in chemistry in 1978 and earned his MD in 1984 from the Pontificia Universidad Católica Madre y Maestra.
Split into simpler sentences: Born to parents who emigrated from Spain, Greer graduated from the Christopher Columbus High School, and then from the University of Florida with a BS in chemistry in 1978. In 1984, he earned his MD from the Pontificia Universidad Católica Madre y Maestra.