Complex sentence: At Columbia, he sang and acted in off-campus productions; and, after graduating, he became a figure in the Harlem Renaissance with performances in "The Emperor Jones" and "All God's Chillun Got Wings".
Split into simpler sentences: At Columbia, he sang and acted in off-campus productions. After graduating, he became a figure in the Harlem Renaissance with performances in "The Emperor Jones" and "All God's Chillun Got Wings".