Are The Knot Garden and Ariadne auf Naxos both operas?
The Knot Garden: The Knot Garden is the third opera by composer Michael Tippett for which he wrote the original English libretto. Ariadne auf Naxos: Ariadne auf Naxos ("Ariadne on Naxos"), Op. Ariadne auf Naxos:  60, is an opera by Richard Strauss with a German libretto by Hugo von Hofmannsthal.
yes