Problem: La Monte Thornton Young (born October 14, 1935) is an American avant-garde composer, musician, and artist generally recognized as the first minimalist composer. His works are cited as prominent examples of post-war experimental and contemporary music, and were tied to New York's downtown music and Fluxus art scenes. Initially inspired by sources such as Indian classical music, serialism, and jazz, Young is perhaps best known for his pioneering work in Western drone music (originally referred to as "dream music"), prominently explored in the 1960s with the experimental music collective the Theatre of Eternal Music. He has engaged in musical and multimedia collaborations with a wide range of artists, including Tony Conrad, Pandit Pran Nath, John Cale, Terry Riley, and visual artist Marian Zazeela, with whom he developed the Dream House sound and light installation.

Beginning in 1970 interests in Asian classical music and a wish to be able to find the intervals he had been using in his work led Young to pursue studies with Pandit Pran Nath. Fellow students included Zazeela, composers Terry Riley, Michael Harrison, and Yoshi Wada, philosophers Henry Flynt and Catherine Christer Hennix and many others.  Young considers The Well-Tuned Piano--a permuting composition of themes and improvisations for just-intuned solo piano--to be his masterpiece. Young gave the world premiere of The Well-Tuned Piano in Rome in 1974, ten years after the creation of the piece. Previously, Young had presented it as a recorded work. In 1975, Young premiered it in New York with eleven live performances during the months of April and May. As of October 25, 1981, the date of the Gramavision recording of The Well-Tuned Piano, Young had performed the piece 55 times. In 1987, Young performed the piece again as part of a larger concert series that included many more of his works. This performance, on May 10, 1987, was videotaped and released on DVD in 2000 on Young's label, Just Dreams. Performances have exceeded six hours in length, and so far have only been documented several times. It is strongly influenced by mathematical composition as well as Hindustani classical music practice.  Since the 1970s, Young and Zazeela have realized a long series of semi-permanent Dream House installations, which combine Young's just-intuned sine waves in elaborate, symmetrical configurations and Zazeela's quasi-calligraphic light sculptures. In July 1970 a model short-term Dream House was displayed to the public at Galerie Heiner Friedrich in Munich, Germany. Later, model Dream House environments were presented in various locations of Europe and the United States. In 1974, the two released Dream House 78' 17". From January through April 19, 2009, Dream House was installed in the Solomon R. Guggenheim Museum in New York as part of The Third Mind exhibition. A Dream House installation exists today at the Mela Foundation on 275 Church Street, New York above the couple's loft, and is open to the public.  In 2002, Young, along with Marian Zazeela, and senior disciple Jung Hee Choi founded the Just Alap Raga Ensemble. This ensemble, performing Indian classical music of the Kirana Gharana, merges the traditions of Western and Hindustani classical music, with Young applying his own compositional approach to traditional raga performance, form, and technique.

Has he made any television appearances?

Answer with quotes: This performance, on May 10, 1987, was videotaped and released on DVD in 2000

Question:
Focus are a Dutch rock band formed in Amsterdam in 1969 by keyboardist, vocalist, and flautist Thijs van Leer. The band have undergone numerous formations in its history; since December 2016 it has comprised van Leer, drummer Pierre van der Linden, guitarist Menno Gootjes, and bassist Udo Pannekeet. Past members include guitarist Jan Akkerman and bassist Bert Ruiter. They have sold one million RIAA-certified albums in the United States.
In mid-1983, both of Akkerman's managers came up with the idea of the guitarist reuniting with van Leer to record new music, to which Akkerman agreed. Van Leer immediately accepted the invitation, and went on to play the synthesiser on "Headbanger" on Akkerman's 1984 solo album From the Basement. After this initial collaboration, one executive at Phonogram Records suggested the pair work with producer Trevor Horn to release an album of re-recorded Focus tracks, but it was dismissed. In the following 15 months, the two wrote, rehearsed, and recorded new music with several additional musicians with engineer Theo Balijob. Their contract required the two to record as a duet, rather under the name Focus. During the recording, producer Ruud Jacobs was brought in to supervise the project due to the length of time taken to put the tracks down. Balijon claimed Jacobs cut corners and pushed for the strongest tracks to be completed quickly to save production costs, which "unintentionally increased the animosity between Jan and Thijs". In the 63 days they spent recording from April to May 1984, around 30 tracks were completed with several additional musicians. Focus was released in March 1985 by Vertigo Records which reached number 33 in the Netherlands. The pair followed the album with promotional videos and a local four-date tour.  In 1988, EMI acquired the rights to the band's back catalogue and reissued their albums on compact disc for the first time.  In 1990, the former line-up of van Leer, Akkerman, van der Linden, and Ruiter reunited for the first time since 1975. The four played a 40-minute set at the Americahal in Apeldoorn on 20 April that was broadcast as part of the Oud van Goud television special. It came about when producer Frans Meijer asked Akkerman to perform a gig with the group, and the fact that the guitarist's manager had not seen the band play in the 1970s, so "it was swatting two flies with one hit". The other three agreed at the opportunity, and they rehearsed for four hours in Wijchen several days prior to the concert. Ruiter said they "went very well"; van Leer said it was "fantastic". Following the concert, van Leer was keen to formally restart Focus with Akkerman, though the latter felt different though he was happy to reunite with van der Linden. On 17 May the group, minus Akkerman, mimed a performance of "House of the King" on the Service Salon television program on AVRO-TV. Originally the band were to perform "Hocus Pocus" with Akkerman, but the guitarist declined the offer made by the network, stating he reunited with Focus for Meijer and his manager. The appearance went ahead regardless.  Van Leer and Akkerman shared the stage once more in 1993, performing Focus songs at the North Sea Jazz Festival.  In 1999, van Leer attempted to reform Focus with Cleuver, Ruiter, and Dutch guitarist Menno Gootjes. They performed several live dates in the Netherlands, but disagreements between van Leer and Ruiter over material intended for release effectively split up the group.
Answer this question using a quote from the text above:

Did the band go on a world tour in the 1985 to 1999 period?

Answer:
They performed several live dates in the Netherlands, but disagreements between van Leer and Ruiter over material intended for release effectively split up the group.