input: In the mid-1980s while rapping in small venues and after a record deal went sour, Hammer borrowed US$20,000 each from former Oakland A's players Mike Davis and Dwayne Murphy to start a record label business called Bust It Productions. He kept the company going by selling records from his basement and car. Bust It spawned Bustin' Records, the independent label of which Hammer was CEO. Together, the companies had more than 100 employees. Recording singles and selling them out of the trunk of his car, he marketed himself relentlessly. Coupled with his dance abilities, Hammer's style was unique at the time. Now billing himself as "M.C. Hammer", he recorded his debut album, Feel My Power, which was produced between 1986 and 1987 and released independently in 1987 on his Oaktown Records label (Bustin'). It was produced by Felton Pilate (of Con Funk Shun), and sold over 60,000 copies and was being distributed by City Hall Records. In the spring of 1988, a 107.7 KSOL Radio DJ Tony Valera played the track "Let's Get It Started" in his mix-shows--a song in which he declared he was "second to none, from Doug E. Fresh, LL Cool J, or DJ Run"--after which the track began to gain popularity in clubs. (He would continue to call out other East Coast rappers in future projects as well.) Hammer also released a single called "Ring 'Em", and largely on the strength of tireless street marketing by Hammer and his wife, plus continued radio mix-show play, it achieved considerable popularity at dance clubs in the San Francisco Bay Area. Heartened by his rising prospects, Hammer launched into seven-day-a-week rehearsals with the growing troupe of dancers, musicians, and backup vocalists he had hired. It was Hammer's stage show, and his infectious stage presence, that led to his big break in 1988 while performing in an Oakland club. There he impressed a record executive who "didn't know who he was, but knew he was somebody", according to the New Rolling Stone Encyclopedia of Rock & Roll. M.C.Hammer had received several offers from major record labels before (which he initially declined due to his personal success), but after the successful release of this independent album and elaborate live dance show amazed the Capitol Records executive, Hammer agreed to sign a record deal soon after. Hammer took home a US$1,750,000 advance and a multi-album contract. It didn't take long for Capitol to recoup its investment.

Answer this question "Did he tour with the release of this album?"
output:

input: Asimov attended New York City public schools from age 5, including Boys High School in Brooklyn. Graduating at 15, he went on to Seth Low Junior College, a branch of Columbia University in Downtown Brooklyn designed to absorb some of the Jewish and Italian-American students who applied to Columbia College, then the institution's primary undergraduate school for men with quotas on the number of admissions from those ethnic groups. Originally a zoology major, Asimov switched to chemistry after his first semester as he disapproved of "dissecting an alley cat". After Seth Low Junior College closed in 1938, Asimov finished his BS degree at University Extension (later the Columbia University School of General Studies) in 1939. After two rounds of rejections by medical schools, Asimov in 1939 applied to the graduate program in chemistry at Columbia; initially rejected and then accepted only on a probationary basis, he completed his Master of Arts degree in chemistry in 1941 and earned a Doctor of Philosophy degree in biochemistry in 1948. In between earning these two degrees, he spent three years during World War II working as a civilian at the Philadelphia Navy Yard's Naval Air Experimental Station, living in the Walnut Hill section of West Philadelphia from 1942 to 1945. In September 1945, he was drafted into the U.S. Army; if he had not had his birth date corrected, he would have been officially 26 years old and ineligible. In 1946, a bureaucratic error caused his military allotment to be stopped, and he was removed from a task force days before it sailed to participate in Operation Crossroads nuclear weapons tests at Bikini Atoll. He served for almost nine months before receiving an honorable discharge on July 26, 1946. He had been promoted to corporal on July 11. After completing his doctorate and a postdoc year, Asimov joined the faculty of the Boston University School of Medicine in 1949 with a $5,000 (equivalent to $51,427 in 2017) salary, with which he remained associated thereafter. By 1952, however, he was making more money as a writer than from the university. The difference grew, and in 1958 Asimov stopped teaching to become a full-time writer. Being tenured, he retained the title of associate professor (which he had held since 1955), and in 1979, the university honored his writing by promoting him to full professor of biochemistry. Asimov's personal papers from 1965 onward are archived at the university's Mugar Memorial Library, to which he donated them at the request of curator Howard Gotlieb. In 1959, after a recommendation from Arthur Obermayer, Asimov's friend and a scientist on the U.S. missile protection project, Asimov was approached by DARPA to join Obermayer's team. Asimov declined on the grounds that his ability to write freely would be impaired should he receive classified information. However, he did submit a paper to DARPA titled "On Creativity" containing ideas on how government-based science projects could encourage team members to think more creatively.

Answer this question "Why did he change"
output:
Asimov switched to chemistry after his first semester as he disapproved of "dissecting an alley cat".