Question: Beatles Forever was an unreleased song by which English rock band?

full_context: Document 1: Something (Beatles song): "Something" is a song by the Beatles, written by George Harrison and released on the band's 1969 album "Abbey Road". It was also issued as a single coupled with another track from the album, "Come Together". "Something" was the first Harrison composition to appear as a Beatles A-side, and the only song written by him to top the US charts before the band's break-up in April 1970. The single was also one of the first Beatles singles to contain tracks already available on an LP album.
Document 2: Forever... The EP: Forever... The EP is an EP containing several international bonus tracks from Lisa "Left Eye" Lopes's remix/studio album "Eye Legacy". It was released to eMusic and is available from iTunes in Australia.
Document 3: Roy Wood: Roy Wood (born 8 November 1947) is an English singer-songwriter and multi-instrumentalist. He was particularly successful in the 1960s and 1970s as member and co-founder of the Move, Electric Light Orchestra and Wizzard. As a songwriter, he contributed a number of hits to the repertoire of these bands.
Document 4: Jeff Lynne: Jeffrey Lynne (born 30 December 1947) is an English songwriter, composer, arranger, singer, multi-instrumentalist and record producer who gained fame in the 1970s as the lead singer and sole constant member of Electric Light Orchestra. In 1988, under the pseudonyms Otis Wilbury and Clayton Wilbury, he co-founded the supergroup Traveling Wilburys with George Harrison, Bob Dylan, Roy Orbison and Tom Petty.
Document 5: The Beatles: The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential act of the rock era. Rooted in skiffle, beat and 1950s rock and roll, the Beatles later experimented with several musical styles, ranging from pop ballads and Indian music to psychedelia and hard rock, often incorporating classical elements and unconventional recording techniques in innovative ways. In 1963 their enormous popularity first emerged as "Beatlemania", and as the group's music grew in sophistication in subsequent years, led by primary songwriters Lennon and McCartney, they came to be perceived as an embodiment of the ideals shared by the counterculture of the 1960s.
Document 6: Return to Pepperland: Return to Pepperland is a cancelled Paul McCartney album recorded in 1984–1987. The album was built up of mostly home demos and was a reflection of work from McCartney's career as a member of the English rock band the Beatles. Although it was made around twenty years after the release of the Beatles' 1967 album "Sgt. Pepper's Lonely Hearts Club Band" (which inspired it), some tracks which made their way onto the bootleg were written whilst McCartney was in the Beatles, including the Lennon–McCartney-written "Love Me Do" and "P.S. I Love You". Other songs turned up on CD-single B-sides including the McCartney/Stewart song "Don't Break the Promise".
Document 7: Video!: "Video!" is a song by Jeff Lynne from the soundtrack to the film "Electric Dreams" in 1984. It is one of two songs that Lynne and keyboard player Richard Tandy provided for the film's soundtrack. The single version is 3:26 in length, while the version included in the film is longer, at 4:18.
Document 8: Beatles Forever: "Beatles Forever" is an unreleased song by Electric Light Orchestra in 1983, intended for the album "Secret Messages", written by Jeff Lynne. Originally, the album was planned to be a double album, but after shortened to a single album, "Beatles Forever" was abandoned. It is the only "lost" track from the original album not to appear later as an official bonus track or part of a compilation. However, the chorus part of "Beatles Forever" was used by Lynne on his "Video!" solo single.
Document 9: Tomorrow Never Knows: "Tomorrow Never Knows" is a song by the English rock band the Beatles, released as the final track on their August 1966 album "Revolver". Credited as a Lennon–McCartney song, it was written primarily by John Lennon. The song has a vocal filtered through a Leslie speaker cabinet (which was normally used as a loudspeaker for a Hammond organ). Tape loops prepared by the Beatles were mixed in and out of the Indian-inspired modal backing underpinned by a constant but non-standard drum pattern. It marked the first recorded use of reversed sounds in a pop song. "Rain", which was released showcasing the technique three months earlier, was recorded after.
Document 10: The Electric Light Orchestra (album): The Electric Light Orchestra is the eponymous debut studio album by English rock band Electric Light Orchestra (ELO), released in December 1971 in the United Kingdom by Harvest Records. In the United States, the album was released in early 1972 as No Answer, after a misunderstood telephone message made by a United Artists Records executive asking about the album name; the caller, having failed to reach the ELO contact, wrote down "no answer" in his notes, and this was misconstrued to be the name of the album.
Document 11: 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 12: Orchestral Manoeuvres in the Dark: Orchestral Manoeuvres in the Dark (OMD) are an English electronic music band formed in Wirral, Merseyside in 1978. Spawned by earlier group The Id, the outfit was founded by Andy McCluskey (vocals, bass guitar) and Paul Humphreys (keyboards, vocals); amid rotating line-ups, Martin Cooper (various instruments) and Malcolm Holmes (drums) are the longest-serving additional members. OMD released their influential debut single, "Electricity", in 1979, and gained popularity throughout Europe with the 1980 anti-war song "Enola Gay". The band achieved broader recognition via their seminal album "Architecture & Morality" (1981) and its three singles, all of which were international hits. Steadily resistant to celebrity status, the group earned acclaim for their adventurous recordings, which combined sonic experimentation and atypical subject matter with musical hooks.
Document 13: Forever and One: "Forever and One (Neverland)" is a song by German power metal band Helloween taken from the album "The Time of the Oath" and composed by Andi Deris, lead vocalist of Helloween. The German version of the single contains a live version of "In the Middle of a Heartbeat" from their album "High Live".
Document 14: Electric Light Orchestra: The Electric Light Orchestra (ELO) are an English rock band formed in Birmingham in 1970, by songwriters/multi-instrumentalists Jeff Lynne and Roy Wood with drummer Bev Bevan. Their music is characterised by a fusion of Beatlesque pop, classical arrangements, and futuristic iconography. After Wood's departure in 1972, Lynne became the band's leader, arranging and producing every album while writing virtually all of their original material.
Document 15: Forever (Bobby Brown album): Forever is the fourth studio album by American singer Bobby Brown. The album's only single, "Feelin' Inside", failed to impact the charts. The album was recorded after Brown left New Edition's "Home Again" tour in 1997. During this time, Brown was the original choice to play Powerline in Walt Disney Pictures's animated movie, "A Goofy Movie", but was cut due to drug problems. Some of the songs Bobby did for the movie's soundtrack were revamped and ended up on "Forever".
ground_truth: Electric Light Orchestra