Question: Night Castle is the fifth rock opera by an American progressive rock band that was founded in 1993 by what producer?

full_context: Document 1: Back to the Trenches: The CD comes with a fifty-two page booklet containing old photos and interviews with Pete Agnew and Dan McCafferty. It also was issued on vinyl.
Document 2: Trans-Siberian Orchestra: Trans-Siberian Orchestra (TSO) is an American progressive rock band founded around 1993 by producer, composer, and lyricist Paul O'Neill, who brought together Jon Oliva and Al Pitrelli (both members of Savatage) and keyboardist and co-producer Robert Kinkel to form the core of the creative team. The band gained in popularity when they began touring in 1999 after completing their second album, "The Christmas Attic" the year previous. In 2007, the "Washington Post" referred to them as "an arena-rock juggernaut" and described their music as "Pink Floyd meets Yes and The Who at Radio City Music Hall." TSO has sold more than 10 million concert tickets and over 10 million albums. The band has released a series of rock operas: "Christmas Eve and Other Stories", "The Christmas Attic", "Beethoven's Last Night", "The Lost Christmas Eve", their two-disc "Night Castle" and "Letters From the Labyrinth". Trans-Siberian Orchestra is also known for their extensive charity work and elaborate concerts, which include a string section, a light show, lasers, "enough pyro to be seen from the International Space Station", moving trusses, video screens, and effects synchronized to music.
Document 3: Christmas Eve/Sarajevo 12/24: "Christmas Eve/Sarajevo 12/24" is an instrumental medley of "God Rest Ye Merry Gentlemen" and "Carol of the Bells" first released on the Savatage album "Dead Winter Dead" in 1995 as "Christmas Eve (Sarajevo 12/24)." It was re-released by the Trans-Siberian Orchestra, a side project of several Savatage members, on TSO's 1996 debut album "Christmas Eve and Other Stories". The piece describes a lone cello player playing a forgotten Christmas carol in war-torn Sarajevo.
Document 4: Neal Morse: Neal Morse (born August 2, 1960) is an American singer, multi-instrumentalist, bandleader and progressive rock composer based in Nashville, Tennessee. In 1995, he formed the progressive rock band Spock's Beard with his brother Alan and released an album which was moderately successful. In 1999, he joined former Dream Theater co-founder Mike Portnoy, Flower Kings' Roine Stolt and Marillion's Pete Trewavas to form the super-group Transatlantic. In 2002, Neal Morse became a born again Christian, left Spock's Beard and began a Christian rock solo career, releasing many progressive rock concept albums about his new religious faith. In the meantime, he continued to play with Transatlantic and formed three new bands, "Yellow Matter Custard", "Flying Colors" and "The Neal Morse Band".
Document 5: The Alan Parsons Project: The Alan Parsons Project was the collective reference to several lineups of a British progressive rock team, active between 1975 and 1990, whose rosters consisted of Alan Parsons and Eric Woolfson surrounded by a varying number of session musicians and some relatively consistent band members such as guitarist Ian Bairnson, arranger Andrew Powell, bassist and vocalist David Paton, drummer Stuart Elliott, and vocalist Lenny Zakatek.
Document 6: The Story of Sigurd the Volsung and the Fall of the Niblungs: The Story of Sigurd the Volsung and the Fall of the Niblungs
Document 7: The Fifth Beatle (graphic novel): The Fifth Beatle is a graphic novel by writer Vivek Tiwary, artist Andrew Robinson, and cartoonist Kyle Baker. It debuted in Italy as part as the tenth anniversary of the country’s "Rolling Stone" magazine and was published by Dark Horse Comics in November 2013.
Document 8: 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 9: Nocturnes (short story collection): Nocturnes: Five Stories of Music and Nightfall is a 2009 collection of short fiction by Kazuo Ishiguro. After six novels, it is Ishiguro first collection of short stories, though described by the publisher as a "story cycle". As the subtitle suggests, each of the five stories focuses on music and musicians, and the close of day. The hardback was published by Faber and Faber in the United Kingdom on 7 May 2009 and in the United States by Knopf in September 2009.
Document 10: Document 5: Document #5 is the first full length album by hardcore punk band Pg. 99, released in 2000 through Reptilian Records. The album was released on vinyl and CD formats, the vinyl version was released in limited quantities, with 666 copies made. 200 copies were on grey marble vinyl, while the rest were standard black vinyl. Reptillian Records announced that the album would be reissued on LP format in the summer of 2015, however it's release date was pushed back to October 27, 2017 to coincide with the band's reunion tour. The reissue was released on compact disc, vinyl, and digital formats.
Document 11: Night Castle: Night Castle is the fifth rock opera by the Trans-Siberian Orchestra; a double CD that includes a sixty-page booklet illustrated by Greg Hildebrandt, it was released on October 28, 2009, debuting at #5 on the Billboard charts and #1 on the rock music charts. It was certified gold in eight weeks and is currently a platinum album.
Document 12: Nightfall in Middle-Earth: Nightfall in Middle-Earth is the sixth full-length studio album by German power metal band Blind Guardian. It was released on April 28, 1998 through Virgin Records. It is a concept album based upon J. R. R. Tolkien's "The Silmarillion", a book of tales from the First Age of Middle-earth, recounting the War of the Jewels. The album contains not only songs but also spoken parts narrating parts of the story. The cover represents Lúthien dancing in front of Morgoth. It is widely regarded as one of Blind Guardian's most well-known and well-received albums in their discography. It is also the first album with Oliver Holzwarth as guest musician, playing bass guitar instead of Hansi Kürsch. "Nightfall in Middle-Earth" was the first album by Blind Guardian to be released in the US. The sales encouraged Century Media to release their entire back catalog in the US in 2007, at which point it was remastered and re-released, with an added bonus track.
Document 13: Dream Theater discography: The discography of Dream Theater, an American progressive metal/rock band, consists of thirteen studio albums, one extended play, eight live albums, one compilation album, eight video albums, twenty-seven singles, and eleven music videos. The band was formed under the name Majesty by guitarist John Petrucci, bassist John Myung, and drummer Mike Portnoy while the three of them were attending Berklee College of Music in September 1985. The trio added keyboard player Kevin Moore and vocalist Chris Collins in order to complete their lineup. After the band released a demo entitled "Majesty Demos", Collins was replaced by Charlie Dominici in November 1987.
Document 14: Nightrise: Nightrise is the third book in "The Power of Five" series, written by Anthony Horowitz. It was published and released in the UK on 2 April 2007 by Walker Books Ltd. It is preceded by "Evil Star", released in 2006, and followed by "Necropolis", which was released on 30 October 2008. The title refers to a fictional organisation represented in the book. And also it refers to the Old Ones' presence on Earth, and their spreading darkness.
Document 15: 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.
ground_truth: Paul O'Neill