Complex sentence: From 1994 through 1997, he served as the Special Representative of the President of the United States Bill Clinton for Arms Control, Non-Proliferation, and Disarmament, and in this capacity successfully led U.S. government efforts to achieve the permanent extension of the NPT in 1995.
Split into simpler sentences: From 1994 through 1997, he was president Bill Clinton's special representative for Arms Control, Non-Proliferation, and Disarmament. Graham successfully led the U.S. government efforts to achieve the permanent extension of the NPT in 1995.