sentences:  Beginning in 1949, Anders undertook such heavier roles as Florestan, Max, Tannhäuser, Lohengrin, Walther, Siegmund, Radames, Otello, with equal success.He made a few guest appearances at the Royal Opera House in London, the La Monnaie in Brussels and the San Carlo in Naples, as well as appearing at the Glyndebourne Festival.Anders sang not only an impressive range of operatic roles but also appeared in several operetta parts.