Please answer the following question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Who plays Alexander? Title: Doctor Zhivago Movie plot: A high ranking Russian General has arrived at an industrial project office. It is night and this man is there on personal business: He is looking for his niece. Somehow, in the past decade, he has managed to find her, or at least someone who appears to be the daughter of his half brother . The would-be niece is skeptical, and afraid. General Yevgraf Zhivago tells her the details of the life of his half brother as he knows it. This is the movie.Yuri Zhivago is a boy, only 8 years old, when his mother dies, somewhere in central Asia, not far from Mongolia. Yuri is adopted by very close friends of his mother, the Gromykos, an upper class family with a home in Moscow and a country estate near the Ural Mountains. The Gromykos have a daughter, Tonya, who is the same age as Yuri.Yuri, now a young man, becomes a doctor, preferring to see "life" in General Practice rather than be a researcher. He is also an accomplished and published poet. Late one winter evening, a lonely group of socialist demonstrators is slaughtered by a Czar Cavalry Unit. Yuri witnesses the entire event from his balcony and attempts to care for the wounded. He is forced back into his home by the soldiers. He is shaken by the event.The following winter, at a music recital, Yuri's mentor is summoned to treat a woman who has attempted suicide, possibly by drinking Iodine. Yuri accompanies his mentor and sees "life" first hand. It is at this woman's home where he first sees Lara, the daughter of the woman. He is smitten. Shortly thereafter, at a Christmas party, the engagement announcement of Yuri and Tonya is interrupted by Lara shooting Komarovsky, Lara's sometime lover and companion. Komarovsky is only slightly wounded and Lara is escorted out of the party by her fiance, Pasha.World War I erupts and Yuri is posted to a field unit far to southwest near Ukraine. Lara is a volunteer nurse in the same area. Her husband (Pasha), disappears during a battle, and is presumed dead. As the summer of 1917 ends, the October Russian Revolution occurs, changing...
Answer:
Ralph Richardson