IN: De Benneville "Bert" Bell (February 25, 1895 - October 11, 1959) was the National Football League (NFL) commissioner from 1945 until his death in 1959. As commissioner, he introduced competitive parity into the NFL to improve the league's commercial viability and promote its popularity, and he helped make the NFL the most financially sound sports enterprise and preeminent sports attraction in the United States (US). He was posthumously inducted into the charter class of the Pro Football Hall of Fame. Bell played football at the University of Pennsylvania, where as quarterback, he led his team to an appearance in the 1917 Rose Bowl.

Bell entered Penn in the fall of 1914 as an English major and joined Phi Kappa Sigma. In a rare occurrence for a sophomore, he became the starting quarterback for Penn's coach George H. Brooke. On the team, he also was as a defender, punter, and punt returner. After the team's 3-0 start, Bell temporarily shared possession of his quarterbacking duties until he subsequently reclaimed them later in the season, as Penn finished with a record of 3-5-2.  Prior to Penn's 1916 season, his mother died while he was en route to her bedside. Nevertheless, he started the first game for the Quakers under new coach Bob Folwell, but mixed results left him platooned for the rest of the season. Penn finished with a record of 7-2-1. However, the Quakers secured an invitation to the 1917 Rose Bowl against the Oregon Ducks. Although the best offensive gain for Penn during their 20-14 loss to Oregon was a 20-yard run by Bell, he was replaced late in the game at quarterback after throwing an interception.  In the 1917 season, Bell led Penn to a 9-2 record. Afterwards, he registered with a Mobile Hospital Unit of the US Army for World War I and was deployed to France in May 1918. As a result of his unit participating in hazardous duty, it received a congratulatory letter for bravery from General John J. Pershing, and Bell was promoted to first sergeant. After the war, Bell returned to the United States in March 1919. He returned to Penn as captain of the team in the fall and again performed erratically. The Quakers finished 1919 with a 6-2-1 record. Academically, his aversion to attending classes forced him to withdraw from Penn without a degree in early 1920. His collegiate days ended with his having been a borderline All-American, but this period of his life had proven that he "possessed the qualities of a leader."

what did he do when he returned to penn?

OUT: He returned to Penn as captain of the team in the fall and again performed erratically.

Answer the question at the end by quoting:

A musical ensemble, also known as a music group or musical group, is a group of people who perform instrumental or vocal music, with the ensemble typically known by a distinct name. Some music ensembles consist solely of instruments, such as the jazz quartet or the orchestra. Some music ensembles consist solely of singers, such as choirs and doo wop groups. In both popular music and classical music, there are ensembles in which both instrumentalists and singers perform, such as the rock band or the Baroque chamber group for basso continuo (harpsichord and cello) and one or more singers.
Five-piece bands have existed in rock music since the development of the genre. The Beach Boys, The Rolling Stones (until 1993), Aerosmith, Def Leppard, AC/DC, Oasis, Pearl Jam, Guns N' Roses, Radiohead, The Strokes, The Yardbirds, 311 and The Hives are examples of the common vocalist, lead guitar, rhythm guitar, bass, and drums lineup whilst other bands such as Judas Priest have two guitarists who equally share lead and rhythm parts. An alternative to the five-member lineup replaces the rhythm guitarist with a keyboard-synthesizer player (examples being the bands Journey, Elbow, Dream Theater, Genesis, Jethro Tull, The Zombies, The Animals, Bon Jovi, Yes, Fleetwood Mac, Marilyn Manson and Deep Purple, all of which consist of a vocalist, guitarist, bassist, keyboardist, and a drummer) or with a turntablist such as Deftones, Hed PE, Incubus or Limp Bizkit.  Alternatives include a keyboardist, guitarist, drummer, bassist, and saxophonist, such as The Sonics, The Dave Clark 5, and Sam the Sham and the Pharaohs. Another alternative is three guitarists, a bassist and a drummer, such as Foo Fighters, Radiohead, and The Byrds. Some five-person bands feature two guitarists, a keyboardist, a bassist and a drummer, with one or more of these musicians (typically one of the guitarists) handling lead vocals on top of their instrument (examples being Children of Bodom, Styx, Sturm und Drang, Relient K, Ensiferum and the current line up of Status Quo). In some cases, typically in cover bands, one musician plays either rhythm guitar or keyboards, depending on the song (one notable band being Firewind, with Bob Katsionis handling this particular role).  Other times, the vocalist will bring another musical "voice" to the table, most commonly a harmonica or percussion; Mick Jagger, for example, played harmonica and percussion instruments like maracas and tambourine whilst singing at the same time. Keith Relf of the Yardbirds played harmonica frequently, though not often while also singing. Ozzy Osbourne was also known to play the harmonica on some occasions (i.e. "The Wizard" by Black Sabbath). Vocalist Robert Brown of lesser known steampunk band Abney Park plays harmonica, accordion, and darbuka in addition to mandolin. Flutes are also commonly used by vocalists, most notably Ian Anderson of Jethro Tull and Ray Thomas of the Moody Blues, though these are difficult to play while singing at the same time.  A less common lineup is to have lead vocals, two guitarists of varying types and two drummers, e.g. Adam and the Ants.

are there some more examples?

The Sonics, The Dave Clark 5, and Sam the Sham

input: Before Hammer's successful music career (with his mainstream popularity lasting approximately between 1988 and 1998) and his "rags-to-riches-to-rags-and-back saga", Burrell formed a Christian rap music group with CCM's Jon Gibson (or "J.G.") called Holy Ghost Boys. Some songs produced were called "Word" and "B-Boy Chill". "The Wall", featuring Burrell (it was originally within the lyrics of this song he first identified himself as K.B. and then eventually M.C. Hammer once it was produced), was later released on Gibson's album Change of Heart (1988). This was Contemporary Christian music's first rap hit ever. Burrell also produced "Son of the King" at that time, releasing it on his debut album. "Son of the King" showed up on Hammer's debut album Feel My Power (1987), as well as the re-released version Let's Get It Started (1988).  With exception to later remixes of early releases, Hammer produced and recorded many rap songs that were never made public, yet are now available on the Internet. Via his record labels such as Bust It Records, Oaktown Records and FullBlast, Hammer has introduced, signed and produced new talent including Oaktown's 3.5.7, Ho Frat Hoo!, the vocal quintet Special Generation, Analise, James Greer, One Cause One Effect, B Angie B, The Stooge Playaz, DASIT (as seen on ego trip's The (White) Rapper Show), Teabag, Common Unity, Geeman and Pleasure Ellis; both collaborating with him and producing music of their own during his career.  At about the age of 12, Oakland native Keyshia Cole recorded with Hammer and sought career advice from him.

Answer this question "Was all of his music released?"
output:
Hammer produced and recorded many rap songs that were never made public, yet are now available