Complex sentence: The Declaration itself was first drafted by Paul Reuter, Schuman's colleague and the lawyer at the Foreign ministry and edited by Jean Monnet and others including Schuman's chef de Cabinet, Bernard Clappier.
Split into simpler sentences: The Declaration itself was first drafted by Paul Reuter, Schuman's colleague and the lawyer at the Foreign ministry. It was edited by Jean Monnet and others including Schuman's "Directeur de Cabinet", Bernard Clappier.