Complex sentence: The emerald is part of the permanent collection of the Smithsonian Institution in (Washington, D.C.), donated in 1969 by the American jeweler Harry Winston; it is labeled under number 122078 in the catalog.
Split into simpler sentences: The emerald is part of the permanent collection of the Smithsonian Institution in (Washington, D.C.). It was donated in 1969 by the American jeweler Harry Winston, and is labeled under number 122078 in the catalog.