Complex sentence: The Ecumenical Officer of the Council of Bishops is William B. Oden and serves as the corporate ecumenical officer of The United Methodist Church, working in collaboration with GCCUIC.
Split into simpler sentences: The Ecumenical Officer of the Council of Bishops is William B. Oden is the Ecumenical Officer of the Council of Bishops. The Council of Bishops serves as the corporate ecumenical officer of The United Methodist Church and works in collaboration with GCCUIC.