Complex sentence: In 1851, Hahn graduated from the University of Louisiana (Tulane University) and the following year he was elected to the city school board at the age of 22; he ran the school system as its director.
Split into simpler sentences: In 1851, Hahn graduated from the University of Louisiana (Tulane University). The following year he was elected to the city school board at the age of 22; he ran the school system as its director.