input: In 1965, Wolfe published a collection of his articles in this style, The Kandy-Kolored Tangerine-Flake Streamline Baby, adding to his notability. He published a second collection of articles, The Pump House Gang, in 1968. Wolfe wrote on popular culture, architecture, politics, and other topics that underscored, among other things, how American life in the 1960s had been transformed by post-WWII economic prosperity. His defining work from this era is The Electric Kool-Aid Acid Test (published the same day as The Pump House Gang in 1968), which for many epitomized the 1960s. Although a conservative in many ways (in 2008, he claimed never to have used LSD and to have tried marijuana only once) Wolfe became one of the notable figures of the decade.  In 1970, he published two essays in book form as Radical Chic & Mau-Mauing the Flak Catchers. "Radical Chic" was a biting account of a party given by composer and conductor Leonard Bernstein to raise money for the Black Panther Party. "Mau-Mauing The Flak Catchers" was about the practice by some African Americans of using racial intimidation ("mau-mauing") to extract funds from government welfare bureaucrats ("flak catchers"). Wolfe's phrase, "radical chic", soon became a popular derogatory term for critics to apply to upper-class leftism. His Mauve Gloves & Madmen, Clutter & Vine (1977) included Wolfe's noted essay, "The Me Decade and the Third Great Awakening."  In 1979, Wolfe published The Right Stuff, an account of the pilots who became America's first astronauts. Following their training and unofficial, even foolhardy, exploits, he likened these heroes to "single combat champions" of a bygone era, going forth to battle in the space race on behalf of their country. In 1983, the book was adapted as a successful feature film.  In 2016 Wolfe published The Kingdom of Speech, a controversial critique of the work of Charles Darwin and Noam Chomsky. His take on how humans developed speech was described as opinionated and not supported by research.

Answer this question "was the film popular"
output: a successful feature film.

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.

Using a quote from the above article, answer the following question: Did anything happen that ended their reunion in 1999?
HHHHHH
Answer:
disagreements between van Leer and Ruiter over material intended for release effectively split up the group.