Problem: Background: Stone Sour is an American rock band formed in Des Moines, Iowa, in 1992, performing for five years, before disbanding in 1997. They reunited in 2000 and since 2006, the group has consisted of Corey Taylor (lead vocals, guitar), Josh Rand (guitar) and Roy Mayorga (drums). Longtime members Joel Ekman (drums, percussion), Shawn Economaki (bass guitar), and Jim Root (guitar) left the group in 2006, 2011, and 2014 respectively. To date, Stone Sour have released six studio albums Stone Sour (2002); Come What(ever)
Context: The band released a song called "The Pessimist" as a free download on their Facebook page on March 27, 2012. The song was previously only available on the iTunes deluxe version of the soundtrack to Transformers: Dark of the Moon. They also released their first DVD Live at Brighton in the same year, capturing their performance on November 7, 2010.  It was announced via Instagram on May 3, 2012 that bassist Shawn Economaki had parted ways with the band on amicable terms. He was replaced in the studio by current Skid Row bassist Rachel Bolan. Stone Sour started recording their fourth studio album in early 2012. Corey Taylor stated that the album would end up being a double album or concept album, and described the album's sound as "Pink Floyd's The Wall meets Alice in Chains's Dirt". It was later announced that the new material would be released as two separate albums. The first album, House of Gold & Bones - Part 1 was released worldwide on October 23, 2012, and the second album House of Gold & Bones - Part 2 was released worldwide on April 9, 2013. The project also has a 4-part graphic novel series that accompanies the albums, telling the linear storyline featured in the twin albums' lyrics.  The first two songs from Part 1, "Gone Sovereign" and the first official single, "Absolute Zero" were released for radio airplay in mid/late August 2012. The first single from House of Gold & Bones Part 2 was "Do Me a Favor". It was released digitally on February 12. Guitarist Josh Rand stated in an interview with O2 Academy that there was a song recorded for Part 1, an instrumental which was deemed 'not up to par' by the band. The song will likely be released in the future once James Root and Josh Rand do 'some stuff to it guitar-wise'.  On October 5, 2012, Johny Chow of Fireball Ministry and Cavalera Conspiracy was announced as the bassist for the band on the House of Gold & Bones tour cycle. Stone Sour subsequently played Soundwave Festival 2013 in Australia and on the Sunday at Download Festival 2013. Guitarist James Root did not tour with Stone Sour in the winter of 2013, as he had to take a brief hiatus from the group to work on .5: The Gray Chapter with Slipknot, although it was later revealed that he was fired from the band due to musical differences. He claimed that the band wanted to focus on "radio play and money," in which Root fought against, and that led to a split. Christian Martucci filled in for Root during that period.
Question: why did Bolan join
Answer: that bassist Shawn Economaki had parted ways with the band on amicable terms. He was replaced in the studio by current Skid Row bassist Rachel Bolan.

Background: William Taylor (July 24, 1921 - December 28, 2010) was an American jazz pianist, composer, broadcaster and educator. He was the Robert L. Jones Distinguished Professor of Music at East Carolina University in Greenville, and from 1994 was the artistic director for jazz at the John F. Kennedy Center for the Performing Arts in Washington, D.C. A jazz activist, Taylor sat on the Honorary Founders Board of The Jazz Foundation of America, an organisation he started in 1989, with Ann Ruckert, Herb Storfer and Phoebe Jacobs, to save the homes and the lives of America's elderly jazz and blues musicians, later including musicians who survived Hurricane Katrina. Taylor was also a jazz educator, who lectured in colleges, served on panels and travelled worldwide as a jazz ambassador.
Context: In 1952 Taylor composed one of his most famous tunes, "I Wish I Knew How It Would Feel to Be Free", which achieved more popularity with the civil rights movement of the 1950s and 1960s. Nina Simone covered the song in her 1967 album Silk & Soul. The tune is widely known in the UK as a piano instrumental version, used for BBC Television's long-running Film... programme. He made dozens of recordings in the 1950s and 1960s, notably the album with Cuban percussionist Candido Camero, entitled Billy Taylor Trio with Candido, My Fair Lady Loves Jazz, Cross Section and Taylor Made Jazz.  Taylor's broadcast career also thrived. In 1961, he founded New York's Jazzmobile, which provides an arts education program via workshops, master classes, lecture demonstrations, arts enrichment programs, outdoor summer mobile concerts, special indoor concerts and special projects. In 1958, he became the Musical Director of NBC's The Subject Is Jazz, the first ever television series focusing on jazz. The 13-part series was produced by the new National Educational Television Network (NET) and hosted guests including Ellington, Aaron Copland, Bill Evans, Cannonball Adderley, Jimmy Rushing and Langston Hughes.  Taylor also worked as a DJ and program director on radio station WLIB in New York in the 1960s. During the 1960s, the Billy Taylor Trio was a regular feature of the Hickory House on West 55th Street in Manhattan. From 1969 to 1972, he served as the music director for The David Frost Show and was the first African American to lead a talk-show band. Louis Armstrong, Count Basie, Benny Goodman and Buddy Rich were just a few of the musicians who played on the show.  In 1981, Jazzmobile produced a jazz special for National Public Radio, for which the program received the Peabody Award for Excellence in Broadcasting Programs. Jazzmobile's 1990 Tribute Concert to Dr. Taylor at Avery Fisher Hall, part of the JVC Jazz Festival, featured Nancy Wilson, Ahmad Jamal Trio and Terence Blanchard Quintet.
Question: What was he up to during his mid career?
Answer:
In 1952 Taylor composed one of his most famous tunes, "I Wish I Knew How It Would Feel to Be Free