Please answer the following question about this movie plot. If it's un-answerable, please output "No answer". Question: Where does Kathleen Turner accept a speaking engagement? Movie plot title: The Jewel of the Nile Movie plot: At a port in the South of France, six months after they met, the romance between Joan Wilder (Kathleen Turner) and Jack Colton (Michael Douglas) has become rocky. While Joan is suffering from a case of writer's block and cannot finish her next romantic novel, Jack only wants to wander the seas aimlessly on his boat, the Angelina. Later that afternoon at a book signing engagement held by her publisher, Gloria (Holland Taylor), Joan meets a charming Arab ruler named Omar (Spiros Focas). Omar confesses to be a fan and offers Joan the opportunity to write his biography. Joan leaves with Omar, despite Jack's disapproval. Jack runs into Ralph (Danny DeVito), the swindler from Jack's past in Colombia. Recently out of prison, Ralph tracks down Jack, wanting to retrieve the stone Jack had stolen. An Arab named Tarak (Paul David Magid), tells Jack of Omar's true intentions and that he has the "Jewel of the Nile". Suddenly, the Angelina explodes, having been sabotaged under Omar's orders. Ralph and Jack team up to find not only Joan but also the fabled jewel. Omar wanted Joan to come with him so she will write a flattering account of his rule in Kadir. During her stay at his palace, she discovers that Omar is a brutal dictator, not the enlightened ruler who will unite the Arab world. In the palace jail, Joan meets Al-Julhara (Avner Eisenberg), a holy man who Omar fears. [Note 1] Learning that the prisoner is really the "Jewel of the Nile", Joan offers to take Al-Julhara to Kadir. The pair escape the palace, and with the help of Jack who hijacks Omar's F-16 fighter aircraft, are able to flee Omar's army into the desert. Ralph is left to fend for himself in the desert, captured by the rebel Sufi tribe led by Tarak, who has sworn to protect the Jewel so he can fulfill his people's destiny. Encountering a Nubian mountain African tribe, Jack is forced to battle for Joan's hand, with the son of the chief. Joan tells Jack, that the Jewel is Al-Julhara. At an upcoming festival in Kadir, Omar uses a smoke and mirror special...
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