Complex sentence: The 40-room house was built by Walter L. Gassaway, a banker and textile mill owner, between 1919 and 1924; his wife, Minnie Quinn Gassaway, took a correspondence course in architecture in order to design the structure.
Split into simpler sentences: The 40-room house was built by Walter L. Gassaway, a banker and textile mill owner, between 1919 and 1924. His wife, Minnie Quinn Gassaway, took a correspondence course in architecture in order to design the structure.