Complex sentence: He served until his death, which was due to a blood clot in his coronary artery; he died in Little Rock on November 6,1931, and lay in state in the Arkansas State Capitol on November 8.
Split into simpler sentences: He served until his death from a blood clot in his coronary artery. He died in Little Rock on November 6,1931, and lay in state in the Arkansas State Capitol on November 8.