Complex sentence: Liebman has published material on a variety of subjects including instructional DVDs; he has published chamber music and over the years has contributed regularly to various periodicals, such as the "Saxophone Journal" and the "International Association of Jazz Educators Journal".
Split into simpler sentences: Liebman has published material on a variety of subjects including instructional DVDs. He has also published chamber music and over the years has contributed regularly to various periodicals, such as the "Saxophone Journal" and the "International Association of Jazz Educators Journal".