Complex sentence: It has been owned by the French violin maker J.B. Vuillaume, the English instrument dealers Hills & Sons, and is currently in the collection of the Library of Congress in Washington, D.C., having been donated in 1935.
Split into simpler sentences: It has been owned by the French violin maker J.B. Vuillaume and the English instrument dealers Hills & Sons. The instrument is currently in the collection of the Library of Congress in Washington, D.C., having been donated in 1935.