Question:
Kurt Friedrich Godel (UK: , US: ; German: ['kUat 'go:dl] ( listen); April 28, 1906 - January 14, 1978) was an Austrian, and later American, logician, mathematician, and philosopher.
At the age of 18, Godel joined his brother in Vienna and entered the University of Vienna. By that time, he had already mastered university-level mathematics. Although initially intending to study theoretical physics, he also attended courses on mathematics and philosophy. During this time, he adopted ideas of mathematical realism. He read Kant's Metaphysische Anfangsgrunde der Naturwissenschaft, and participated in the Vienna Circle with Moritz Schlick, Hans Hahn, and Rudolf Carnap. Godel then studied number theory, but when he took part in a seminar run by Moritz Schlick which studied Bertrand Russell's book Introduction to Mathematical Philosophy, he became interested in mathematical logic. According to Godel, mathematical logic was "a science prior to all others, which contains the ideas and principles underlying all sciences." Attending a lecture by David Hilbert in Bologna on completeness and consistency of mathematical systems may have set Godel's life course. In 1928, Hilbert and Wilhelm Ackermann published Grundzuge der theoretischen Logik (Principles of Mathematical Logic), an introduction to first-order logic in which the problem of completeness was posed: Are the axioms of a formal system sufficient to derive every statement that is true in all models of the system? This became the topic that Godel chose for his doctoral work. In 1929, at the age of 23, he completed his doctoral dissertation under Hans Hahn's supervision. In it, he established the completeness of the first-order predicate calculus (Godel's completeness theorem). He was awarded his doctorate in 1930. His thesis, along with some additional work, was published by the Vienna Academy of Science.
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What subjects did Godel study in Vienna?

Answer:
mathematics and philosophy.

Question:
Muhammad Ali (; born Cassius Marcellus Clay Jr.; January 17, 1942 - June 3, 2016) was an American professional boxer and activist. He is widely regarded as one of the most significant and celebrated sports figures of the 20th century. From early in his career, Ali was known as an inspiring, controversial, and polarizing figure both inside and outside the ring. Cassius Clay was born and raised in Louisville, Kentucky, and began training as an amateur boxer when he was 12 years old.
Cassius Marcellus Clay Jr. () was born on January 17, 1942, in Louisville, Kentucky. He had a sister and four brothers. He was named for his father, Cassius Marcellus Clay Sr. (1912-1990), who himself was named in honor of the 19th-century Republican politician and staunch abolitionist, Cassius Marcellus Clay, also from the state of Kentucky. Clay's father's paternal grandparents were John Clay and Sallie Anne Clay; Clay's sister Eva claimed that Sallie was a native of Madagascar. He was a descendant of slaves of the antebellum South, and was predominantly of African descent, with smaller amounts of Irish and English heritage. His father painted billboards and signs, and his mother, Odessa O'Grady Clay (1917-1994), was a domestic helper. Although Cassius Sr. was a Methodist, he allowed Odessa to bring up both Cassius Jr. and his younger brother Rudolph "Rudy" Clay (later renamed Rahman Ali) as Baptists. Cassius Jr. attended Central High School in Louisville. Clay grew up amid racial segregation. His mother recalled one occasion when he was denied a drink of water at a store--"They wouldn't give him one because of his color. That really affected him." He was also affected by the 1955 murder of Emmett Till, which led to young Clay and a friend's taking out their frustration by vandalizing a local railyard. Clay was first directed toward boxing by Louisville police officer and boxing coach Joe E. Martin, who encountered the 12-year-old fuming over a thief's having taken his bicycle. He told the officer he was going to "whup" the thief. The officer told Clay he had better learn how to box first. Initially, Clay did not take up Martin's offer, but after seeing amateur boxers on a local television boxing program called Tomorrow's Champions, Clay was interested in the prospect of fighting. He then began to work with trainer Fred Stoner, whom he credits with giving him the "real training", eventually moulding "my style, my stamina and my system". For the last four years of Clay's amateur career he was trained by boxing cutman Chuck Bodak. Clay made his amateur boxing debut in 1954 against local amateur boxer Ronnie O'Keefe. He won by split decision. He went on to win six Kentucky Golden Gloves titles, two national Golden Gloves titles, an Amateur Athletic Union national title, and the Light Heavyweight gold medal in the 1960 Summer Olympics in Rome. Clay's amateur record was 100 wins with five losses. Ali said in his 1975 autobiography that shortly after his return from the Rome Olympics, he threw his gold medal into the Ohio River after he and a friend were refused service at a "whites-only" restaurant and fought with a white gang. The story was later disputed, and several of Ali's friends, including Bundini Brown and photographer Howard Bingham, denied it. Brown told Sports Illustrated writer Mark Kram, "Honkies sure bought into that one!" Thomas Hauser's biography of Ali stated that Ali was refused service at the diner but that he lost his medal a year after he won it. Ali received a replacement medal at a basketball intermission during the 1996 Olympics in Atlanta, where he lit the torch to start the games.
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who were his parents

Answer:
He was named for his father, Cassius Marcellus Clay Sr. (1912-1990),

Question:
Hideto Matsumoto (Song Ben Xiu Ren , Matsumoto Hideto, December 13, 1964 - May 2, 1998), better known by his stage name hide, was a Japanese musician, singer and songwriter. He is primarily known for his work as lead guitarist of the heavy metal band X Japan.
hide joined X Japan (then called X) in February 1987, becoming the band's lead guitarist and occasional songwriter, going on to compose songs like "Celebration", "Joker" and the single "Scars". X released their first album Vanishing Vision, through drummer Yoshiki's own Extasy Records, on April 14, 1988 and toured extensively in support of the record. They would become one of the first Japanese acts to achieve mainstream success while on an independent label, and later widely credited as one of the pioneers of visual kei. X 's major label debut album, Blue Blood, was released on April 21, 1989 and debuted at number six on the Oricon chart. Its success earned the band the "Grand Prix New Artist of the Year" award at the 4th annual Japan Gold Disc Awards in 1990. Their third album Jealousy was released on July 1, 1991 and debuted at number one, selling over 600,000 copies. It was later certified million by the RIAJ. Shortly after the release of Art of Life, which also topped the Oricon, the members of X Japan took a break, to start solo projects. Around that time, the group also dropped most of its original visual kei aesthetics, except hide who would still perform in wildly colorful outfits and with his trademark red, later pink, hair. Dahlia, which would become the band's last album, was released on November 4, 1996 and once again, it reached the number one spot. In September 1997 it was announced that X Japan would disband, they performed their farewell show, aptly titled The Last Live, at the Tokyo Dome on December 31, 1997.
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What happen in 1987

Answer:
hide joined X Japan (then called X) in February 1987, becoming the band's lead guitarist and occasional songwriter,