Complex sentence: Johnson hand-selected a group of economists charged with creating the non-partisan, independent research organization, a group that included Kermit Gordon, McGeorge Bundy, Irwin Miller, Arjay Miller, Richard Neustadt, Cyrus Vance, and Robert McNamara.
Split into simpler sentences: Johnson hand-selected a group of economists to create the non-partisan, independent research organization. Their ranks included Kermit Gordon, McGeorge Bundy, Irwin Miller, Arjay Miller, Richard Neustadt, Cyrus Vance, and Robert McNamara.