Complex sentence: Davenport & Co. did work on the James J. Hill House (1891) in Minneapolis, Minnesota, but the architects, Peabody and Stearns, were fired before the building's completion and its interiors were completed by Irving & Casson.
Split into simpler sentences: Davenport & Co. did work on the James J. Hill House (1891) in Minneapolis, Minnesota. The architects, Peabody and Stearns, were fired before the building's completion and its interiors were completed by Irving & Casson.