Question: Jānis Liepiņš was a conductor for which opretta composed by Johann Strauss II?
Sentence (from "Jānis Liepiņš (conductor)"): Gianni Schicchi, Eugene Onegin, Romeo and Juliet, Scheherezade and Her Tales and La Bayadere; he was the conductor and musical director for the ballet Raymonda and operetta Die Fledermaus.
Relevant evidence: Yes