Ferdinand Zellbell the Younger
... that Ferdinand Zellbell the Younger was the only co-founder of the Royal Swedish Academy of Music who was a professional musician?
... that <b id="mwBl4"><a href="./Ferdinand_Zellbell_the_Younger" id="mwBl8" rel="mw:WikiLink" title="Ferdinand Zellbell the Younger">Ferdinand Zellbell the Younger</a></b> was the only co-founder of the <a href="./Royal_Swedish_Academy_of_Music" id="mwBmA" rel="mw:WikiLink" title="Royal Swedish Academy of Music">Royal Swedish Academy of Music</a> who was a professional musician?