Complex sentence: Thomas J. Drennan (1877-July 15,1928) was appointed the 10th Fire Commissioner of the City of New York by Mayor John F. Hylan on January 1,1918, and resigned his position on April 30,1926.
Split into simpler sentences: Thomas J. Drennan (1877-July 15,1928) was appointed the 10th New York City Fire Commissioner by Mayor John F. Hylan. He was appointed the 10th Fire Commissioner of the City of New York by Mayor John F. Hylan on January 1,1918, and resigned his position on April 30,1926.