Question: Craig Frost is known as the keyboardist fo an American rock band whose names is a play on words of what?

full_context: Document 1: Terry Knight and the Pack: Terry Knight and the Pack (earlier known as the Pack) was an American garage rock band formed in Flint, Michigan in 1965. The band was signed to the Lucky Eleven label throughout most of its short recording career, and they produced one national hit with their cover version of the song, "I (Who Have Nothing)". Despite their inability to replicate their success, the band was still a frequent attraction in the Michigan rock scene. The Pack was fronted by singer, Terry Knight. In 1967, the group disbanded, but two of the members of the band, drummer/vocalist Don Brewer and guitarist Mark Farner, would later go on to form another band, Grand Funk Railroad.
Document 2: Emerson, Lake &amp; Palmer: Emerson, Lake & Palmer (ELP) were an English progressive rock supergroup formed in London in 1970. The band consisted of keyboardist Keith Emerson, singer, bassist and producer Greg Lake and drummer and percussionist Carl Palmer. With nine RIAA-certified gold record albums in the US, and an estimated 48 million records sold worldwide, they were one of the most popular and commercially successful progressive rock bands in the 1970s, with a musical sound including adaptations of classical music with jazz and symphonic rock elements, dominated by Emerson's flamboyant use of the Hammond organ, Moog synthesizer, and piano (although Lake wrote several acoustic songs for the group).
Document 3: Funkadelic: Funkadelic is an American band that was most prominent during the 1970s. The band and its sister act Parliament, both led by George Clinton, pioneered the funk music culture of that decade.
Document 4: GoodThunder: GoodThunder was a psychedelic/progressive rock/hard rock band that formed in 1972 as James Cahoon Lindsay (vocals and percussion), John Desautels (drums), David Hanson (guitars and vocals), Bill Rhodes (bass), and Wayne Cook (keyboard). Other members include Fritz Richmond (engineering), Rick Rodrigues (cover art), Lorrie Sullivan (photography), and Robert Heimall (art direction). Not much is known about this band except the information you find on the back cover of their first and only album. If you don't listen to it, the only thing that stands out on this album is the fact that famous producer Paul A. Rothchild (who produced albums by The Doors, Janis Joplin, and Rush just to name a few) produced this album. Most of the core band went on to join AOR band L.A. Jets, then most of L.A. Jets went on to record under the name 1994. Both L.A. Jets and 1994 included GoodThunder members John Desautels, Bill Rhodes, Terry Linvill, and included singer/songwriter Karen Lawrence. Wayne Cook went on to play keyboards with Steppenwolf and co-wrote the instrumental "Lip Service" from the Skullduggery album. Wayne Cook also played keyboards with Player on their first two albums, he filled in as keyboardist for Alice Cooper for a few shows, but was never a permanent member.
Document 5: Grand Funk Railroad: Grand Funk Railroad, sometimes shortened as Grand Funk, is an American rock band popular during the 1970s, when they toured extensively and played to packed arenas worldwide. David Fricke of "Rolling Stone" magazine once said, "You cannot talk about rock in the 1970s without talking about Grand Funk Railroad!" Known for their crowd-pleasing arena rock style, the band was well-regarded by audiences despite a relative lack of critical acclaim. The band's name is a play on words of the Grand Trunk Western Railroad, a line that ran through the band's home town of Flint, Michigan.
Document 6: Worldwide Texas Tour: The Worldwide Texas Tour was a concert tour by American rock band ZZ Top. Arranged in support of their 1975 album "Fandango!", the band visited arenas, stadiums, and auditoriums from 1976 to 1977. To match the newfound success of "Fandango!", the tour was envisioned to differ from their past and surpass expectations of the band. Contrary to ZZ Top's modest stage setups from previous tours, the Worldwide Texas Tour was an elaborately staged multimedia event. It utilized audio and visual stimulation by striving to introduce "Texas paraphernalia" to its audience. To avoid their reputation for being insignificant and overly criticized, ZZ Top adopted a more playful and self-deprecating persona on tour. The Worldwide Texas Tour and "Fandango!" were essential to the group's success in the 1970s.
Document 7: Mark, Don &amp; Terry 1966–67: Mark, Don & Terry 1966–67 is a 1972 2-LP set compilation album by the American garage rock band Terry Knight and the Pack released on ABKCO Records in an effort to cash in on the March 1972 Capitol Records album "" by Grand Funk Railroad. The album has a plain blue cover with lettering similar to that of the plain black cover of the earlier Grand Funk Railroad release. Mark Farner and Don Brewer from Grand Funk had been in Terry Knight and The Pack with Terry Knight, who then managed them until 1972. Knight also managed the Ft. Worth Texas group Bloodrock until mid 1971.
Document 8: Bob Seger: Robert Clark Seger ( , born May 6, 1945) is an American singer-songwriter, guitarist and pianist. As a locally successful Detroit-area artist, he performed and recorded as Bob Seger and the Last Heard and Bob Seger System throughout the 1960s. By the early 1970s, he had dropped the 'System' from his recordings and continued to strive for broader success with various other bands. In 1973, he put together the Silver Bullet Band, with a group of Detroit-area musicians, with whom he became most successful on the national level with the album "Live Bullet" (1976), recorded live with the Silver Bullet Band in 1975 at Cobo Hall in Detroit, Michigan. In 1976, he achieved a national breakout with the studio album "Night Moves". On his studio albums, he also worked extensively with the Alabama-based Muscle Shoals Rhythm Section, which appeared on several of Seger's best-selling singles and albums.
Document 9: Mark Farner: Mark Fredrick Farner (born September 29, 1948) is an American singer, guitarist and songwriter, best known as the lead singer and lead guitarist for Grand Funk Railroad, and later as a contemporary Christian musician.
Document 10: Aerosmith: Aerosmith is an American rock band, sometimes referred to as "the Bad Boys from Boston" and "America's Greatest Rock and Roll Band". Their style, which is rooted in blues-based hard rock, has come to also incorporate elements of pop, heavy metal, and rhythm and blues, and has inspired many subsequent rock artists. They were formed in Boston, Massachusetts in 1970. Guitarist Joe Perry and bassist Tom Hamilton, originally in a band together called the Jam Band, met up with vocalist/pianist/harmonicist Steven Tyler, drummer Joey Kramer, and guitarist Ray Tabano, and formed Aerosmith. In 1971, Tabano was replaced by Brad Whitford, and the band began developing a following in Boston.
Document 11: Max Carl: Max Carl Gronenthal (born January 29, 1950) is an American rock singer, keyboardist, guitarist and songwriter. He is the current co-lead singer of the classic rock band Grand Funk Railroad. In addition, he spent several years as the keyboardist and lead singer for the southern rock band 38 Special, for whom he co-wrote and sang lead on the hit song "Second Chance".
Document 12: We're an American Band (song): "We're an American Band" (from the album of the same name) became Grand Funk Railroad's first #1 single on September 29, 1973, Mark Farner's 25th birthday. Written by Don Brewer and produced by Todd Rundgren, its huge chart success broadened Grand Funk's appeal. It was sung by Brewer rather than Farner, who usually took lead vocals.
Document 13: Alto Reed: Born in Detroit, Michigan as Thomas Neal Cartmell and a 1966 graduate of Lake Shore High School in St. Clair Shores, Michigan, Alto Reed is an American saxophonist best known as a long-time member of Bob Seger and the Silver Bullet Band. His most recognizable performances include the iconic saxophone introduction to "Turn the Page" and the saxophone solo in "Old Time Rock and Roll". Reed has also recorded the soundtracks for two of Jeff Daniels' films, and has performed with many bands and musicians, such as Foghat, Grand Funk Railroad, Little Feat, Otis Rush, Enchantment, Jamie Oldaker, George Terry, Dave Mason, Spencer Davis, Tico Torres, Dan Aykroyd, James Belushi, The Blues Brothers, The Ventures, George Thorogood, Robin Gibb and in Romania with the band Holograf.
Document 14: Craig Frost: Craig Frost (born April 20, 1948 in Flint, Michigan) is the keyboardist for Bob Seger & The Silver Bullet Band. He is also known as keyboardist for 1970s hard rock band Grand Funk Railroad. He plays organ, synthesizer, and piano.
Document 15: Rick Lober: Rick Lober is the original keyboardist of the 1960s Detroit rock band The Amboy Dukes. His band mates were Ted Nugent, Steve Farmer, John Drake, Dave Palmer and Bill White.
ground_truth: Grand Trunk Western Railroad