sentences:  He also regularly tours with the Muir String Quartet, which he co-founded in 1979.In January 2011, Ansell and the Muir String Quartet performed with former U.S. Secretary of State and pianist Condoleezza Rice.Ansell's solo appearances include Mozart's "Sinfonia Concertante" with Malcolm Lowe under the baton of André Previn; Berlioz's "Harold in Italy" with Emmanuel Krivine; Bruch's Concerto for Viola, Clarinet and Orchestra with Seiji Ozawa; and Strauss's "Don Quixote" with Mstislav Rostropovich, among others.