Complex sentence: Governor Robert E. McNair saw the formation of a Governor's Mansion Committee by his wife, Josephine McNair, which was able to obtain numerous items related to South Carolina's culture and history for the furnishing of the mansion.
Split into simpler sentences: Governor Robert E. McNair formed a Governor's Mansion Committee, managed by his wife, Josephine McNair. The committee was able to obtain numerous items related to South Carolina's culture and history for the furnishing of the mansion.