Complex sentence: In 1963, she immigrated to the United States to attend the University of Pennsylvania Graduate School of Fine Arts where she was a professor of painting and art history there from 1968 until 1998.
Split into simpler sentences: In 1963, she immigrated to the United States to attend the University of Pennsylvania Graduate School of Fine Arts. She was a professor of painting and art history at Philadelphia University of the Arts from 1968 until 1998.