Complex sentence: The Pope House was officially listed on the National Register of Historic Places on November 22,1999, and the following month the trustees of the Pope Charitable Foundation decided to begin the process of turning the house into a museum.
Split into simpler sentences: The Pope House was officially listed on the National Register of Historic Places on November 22,1999. The following month the trustees of the Pope Charitable Foundation decided to begin the process of turning the house into a museum.