In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Passage: Another common use of the theme is as a prison for villains or demons. The idea is used in the first two Superman movies starring Christopher Reeve where Kryptonian villains were sentenced to the Phantom Zone from where they eventually escaped. An almost exactly parallel use of the idea is presented in the campy cult film The Adventures of Buckaroo Banzai Across the 8th Dimension, where the "8th dimension" is essentially a "phantom zone" used to imprison the villainous Red Lectroids. Uses in horror films include the 1986 film From Beyond (based on the H. P. Lovecraft story of the same name) where a scientific experiment induces the experimenters to perceive aliens from a parallel universe, with bad results. The 1987 John Carpenter film Prince of Darkness is based on the premise that the essence of a being described as Satan, trapped in a glass canister and found in an abandoned church in Los Angeles, is actually an alien being that is the 'son' of something even more evil and powerful, trapped in another universe. The protagonists accidentally free the creature, who then attempts to release his "father" by reaching in through a mirror.
Link Information: Thaxter was producer Ilya Salkind's mother-in-law. Question: Who produced the movie starring Christoper Reeve which used the idea of a prison for villians?
Answer: Ilya Salkind

Passage: Alabama was central to the Civil War, with the secession convention at Montgomery, birthplace of the Confederacy, inviting other states to form a Southern Republic, during JanuaryMarch 1861, and develop constitutions to legally run their own affairs. The 1861 Alabama Constitution granted citizenship to current U.S. residents, but prohibited import duties (tariffs) on foreign goods, limited a standing military, and as a final issue, opposed emancipation by any nation, but urged protection of African slaves, with trial by jury, and reserved the power to regulate or prohibit the African slave trade. The secession convention invited all slaveholding states to secede, but only 7 Cotton States of the Lower South formed the Confederacy with Alabama, while the majority of slave states were in the Union and voted to make U.S. slavery permanent by passing the Corwin Amendment, signed by President Buchanan and backed by President Lincoln on March 4, 1861.
Link Information: Beginning February 4, 1861, representatives from Alabama, Georgia, Florida, Louisiana, Mississippi, and South Carolina met in Montgomery, host of the Southern Convention, to form the Confederate States of America. Question: What dates did the secession convention occur in Alabama?
Answer: Beginning February 4, 1861

Passage: Born the son of Colonel Arthur Hare Vincent and Elizabeth Rose Manson and educated at Wellington College and the Royal Military Academy, Woolwich, Vincent was commissioned into the Royal Artillery as a second lieutenant on 24 July 1891. He was promoted to lieutenant on 24 July 1894 and to captain on 13 February 1900. He served with the China Expeditionary Force in late 1900 and then in the Second Boer War in South Africa. Following the end of the war, Vincent left Point Natal for India on the SS Ionian in October 1902 with other officers and men of the J Battery Royal Horse Artillery, and after arrival in Bombay, was stationed in Meerut, Bengal Presidency. In 1903, Vincent was sent to Tokyo to learn Japanese: he served as British military attache with the Japanese Army during the Russo-Japanese War and, from 1 March 1904, was attached to the 2nd Division of the First Japanese Army in Manchuria.
Link Information: For example, during the Tianjin fighting, the Japanese, while comprising less than one quarter (3,800) of the total allied force of 17,000, suffered more than half of the casualties, 400 out of 730. Similarly at Beijing, the Japanese, constituting slightly less than half of the assault force, accounted for almost two-thirds of the losses, 280 of 453. Question: How many casualties had the Japanese Army suffered by the time Vincent was sent to Tokyo?
Answer: , 400