Complex sentence: The house continued to be used as a residence by various owners until 1935, when Conner's house was purchased by Eli Lilly, who was at that time president of the Indiana Historical Society.
Split into simpler sentences: The house continued to be used as a residence by various owners until 1935. That year Conner's house was purchased by Eli Lilly, who was at that time president of the Indiana Historical Society.