Complex sentence: In 1948 Cherniss resigned from Berkeley and was appointed as a faculty member at the Institute for Advanced Study in Princeton, New Jersey by his old friend Robert Oppenheimer.
Split into simpler sentences: In 1948 Cherniss resigned from Berkeley and was appointed as a faculty member at the Institute for Advanced Study in Princeton, New Jersey. ' a Cherniss was appointed by his old friend Robert Oppenheimer.