Introduction and Variations on a Theme by Mozart
... that classical guitarist and composer Fernando Sor's most popular work, Introduction and Variations on a Theme by Mozart, was written in 1821 and dedicated to his brother Carlos?
... that <a href="./Classical_guitar" id="mwBlM" rel="mw:WikiLink" title="Classical guitar">classical guitarist</a> and composer <a href="./Fernando_Sor" id="mwBlQ" rel="mw:WikiLink" title="Fernando Sor">Fernando Sor</a>'s most popular work, <b id="mwBlU"><a class="mw-redirect" href="./Introduction_and_Variations_on_a_Theme_by_Mozart,_op.9" id="mwBlY" rel="mw:WikiLink" title="Introduction and Variations on a Theme by Mozart, op.9">Introduction and Variations on a Theme by Mozart</a></b>, was written in 1821 and dedicated to his brother Carlos?