Complex sentence: From 1992 to 2006 Dmitriev was married to Tatiana Druchinina, a former outstanding Soviet gymnast, who choreographed the Olympic programs of ice dancers Tatiana Navka and Roman Kostomarov, and is the choreographer for Yuko Kawaguchi and Alexander Smirnov.
Split into simpler sentences: From 1992 to 2006 Dmitriev was married to Tatiana Druchinina, a former outstanding Soviet gymnast turned choreographer. Incidentally, she choreographed the Olympic programs of ice dancers Tatiana Navka and Roman Kostomarov, and is the choreographer for Yuko Kawaguchi and Alexander Smirnov.