Complex sentence: On August 31,1901, Czolgosz traveled to Buffalo, New York, the site of the Pan-American Exposition, where he rented a room at Nowak's Hotel on 1078 Broadway.
Split into simpler sentences: On August 31,1901, Czolgosz traveled to Buffalo, New York, the site of the Pan-American Exposition. There, he rented a room at Nowak's Hotel on 1078 Broadway.