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Mark David Rosenthal is an American screenwriter and film director. He is also the long-time writing partner of Lawrence Konner. The writing team work together on the films The Legend of Billie Jean, The Jewel of the Nile, Superman IV: The Quest for Peace, and Star Trek VI: The Undiscovered Country, as well as the screenplays for Mona Lisa Smile, Flicka, and Mercury Rising. Wikipedia