Conversation so far:
What were some major collaborations for Kathleen Battle?
Among the conductors with whom Kathleen Battle has worked are Herbert von Karajan, Riccardo Muti, Zubin Mehta, Seiji Ozawa, Claudio Abbado, Georg Solti, Carlo Maria Giulini, and James Levine.

Question: Is there anyone else?
Self-contained rewrite: Is there anyone else that Kathleen Battle has worked with besides Herbert von Karajan, Riccardo Muti, Zubin Mehta, Seiji Ozawa, Claudio Abbado, Georg Solti, Carlo Maria Giulini, and James Levine?