Complex sentence: He also served as the President of the Centre de Guillaume IX, a center for research in Troubadour studies, and was a member of the editorial board of Semasia (a romance philology publication).
Split into simpler sentences: He also served as the President of the Centre de Guillaume IX, a center for research in Troubadour studies. He was also a member of the editorial board of Semasia (a romance philology publication).