Question: In what year was the follow up to "The Purple Prince of Oz released?

Documents:
source: The Silver Princess in Oz
text: The Silver Princess in Oz The Silver Princess in Oz (1938) is the thirty-second of the Oz books created by L. Frank Baum and his successors, and the eighteenth written by Ruth Plumly Thompson. It was illustrated by John R. Neill.

source: Jinnicky the Red Jinn
text: Jinnicky the Red Jinn The Red Jinn, later known as Jinnicky, is one of Ruth Plumly Thompson's most frequently occurring characters in her Oz books. He was first introduced in "Jack Pumpkinhead of Oz" as a mysterious figure who educates Jack Pumpkinhead on the use of the Pirate Sack. Although a detailed description is included in the text, "Jack Pumpkinhead of Oz" includes no illustrations of the Red Jinn aside from a gruesome color plate that did not appear outside the first edition, in which he has massive piercings. He was reintroduced, drawn, and given the name Jinnicky in "The Purple Prince of Oz"; he also appeared in the follow-up, "The Silver Princess in Oz". (He makes a cameo appearance in "The Wishing Horse of Oz", and he is the principal pre-existing character in Thompson's sub-canonical penultimate Oz book, "Yankee in Oz"). Jack Snow apparently thought the Red Jinn was a separate character, for he considered "The Purple Prince of Oz" Jinnicky's first appearance in "Who's Who in Oz", though he did not include a separate Red Jinn entry.

source: List of Deep Purple band members
text: List of Deep Purple band members Deep Purple are an English hard rock band from Hertford, Hertfordshire. Originally known as Roundabout, the group formed in March 1968 featuring vocalist Rod Evans, guitarist Ritchie Blackmore, bassist Nick Simper, drummer Ian Paice and keyboardist Jon Lord. This first lineup of the band, known as Mark I, released three albums within the space of a year – "Shades of Deep Purple", "The Book of Taliesyn" and "Deep Purple" – before Evans and Simper were fired from the band at the request of Blackmore and Lord. Mark II of Deep Purple saw Ian Gillan and Roger Glover replace Evans and Simper, respectively, in the summer of 1969. This lineup of the band has since been identified as their most successful, with their next four albums reaching the top four of the UK Albums Chart, including number-one albums "Fireball" and "Machine Head".

source: The Baum Bugle
text: The Baum Bugle The Baum Bugle: A Journal of Oz is the official journal of The International Wizard of Oz Club. The journal was founded in 1957, with its first issue released in June of that year (to a subscribers' list of sixteen). It publishes three times per year, with issues dated Spring, Autumn, and Winter; Issue No. 1 of Volume 50 appeared in the Spring of 2006. The journal publishes both scholarly and popular articles on L. Frank Baum, the Oz books written by Baum and other writers, and related subjects, plus reviews of Oz-related films and theater productions, rare photographs and illustrations, and similar materials.

source: Tommy Bolin and Friends: Great Gypsy Soul
text: Tommy Bolin and Friends: Great Gypsy Soul Tommy Bolin and Friends: Great Gypsy Soul, often referred to as simply Great Gypsy Soul, is a double tribute album to former Deep Purple guitarist Tommy Bolin. Released on March 26, 2012, the album contains newly recorded music from original outtakes and alternative versions, with several modern musicians and singers performing singing on top of the original multi-tracks along with Bolin and his band. All tracks contain Bolin's original guitar work and vocals. Additional performers include Joe Bonamassa, Nels Cline, Peter Frampton, Warren Haynes, Glenn Hughes, Myles Kennedy, Sonny Landreth, Steve Lukather, Steve Morse, Oz Noy, Prairie Prince, John Scofield, Big Sugar, Derek Trucks and Brad Whitford.

source: Buddleja davidii 'Purple Prince'
text: Buddleja davidii 'Purple Prince' Buddleja davidii 'Purple Prince' is an old American cultivar raised by Paul Schmidt at Youngstown, Ohio. The cultivar is believed to be the progeny of a crossing with 'Ile de France'. 'Purple Prince' came 3rd overall in the public popularity poll conducted by the Royal Horticultural Society in its Buddleja trials at Wisley from 2008 to 2010.

source: The Purple Prince of Oz
text: The Purple Prince of Oz The Purple Prince of Oz (1932) is the 26th in the series of Oz books created by L. Frank Baum and his successors, and the 12th written by Ruth Plumly Thompson. It was illustrated by John R. Neill.

source: Purple Reign
text: Purple Reign Purple Reign is a mixtape by American rapper Future, hosted and executive-produced by DJ Esco and Metro Boomin. It was released on January 17, 2016 with an 11-hour notice via LiveMixtapes and DatPiff. It is Future's first non-commercial mixtape since the mixtape trilogy "Monster" (2014), "Beast Mode" and "56 Nights" (2015). "Purple Reign" follows the commercial collaborative mixtape "What a Time to Be Alive" with Canadian rapper Drake. The mixtape features production from frequent collaborators Metro Boomin, Southside, Zaytoven, DJ Spinz and Nard & B, among others. The cover font is a tribute to Prince's landmark 1984 album "Purple Rain", which is stylized in the same fashion.

source: Let's Go Crazy
text: Let's Go Crazy "Let's Go Crazy" is a 1984 song by Prince and The Revolution, from the album "Purple Rain". It was the opening track on both the album and the film "Purple Rain". "Let's Go Crazy" was one of Prince's most popular songs, and was a staple for concert performances, often segueing into other hits. When released as a single, the song became Prince's second number-one hit on the "Billboard" Hot 100, and also topped the two component charts, the Hot R&B/Hip-Hop Songs and Hot Dance Club Play charts, as well as becoming a UK Top 10 hit. The B-side was the lyrically controversial "Erotic City". In the UK, the song was released as a double A-side with "Take Me with U".

source: La Leyenda de la Mancha
text: La Leyenda de la Mancha La Leyenda de La Mancha (The Legend of La Mancha) is an album by the Spanish folk metal band Mägo de Oz released in 1998. It is a concept album, specifically a modern-day retelling of the Spanish classic "Don Quixote". This album is perhaps the band's most famous one. The song "Molinos de viento" is one of Mägo de Oz's biggest hits and is often the concluding song in concerts.

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Answer: 1938