Background: Stephen Arthur Stills (born January 3, 1945) is an American singer, songwriter, and multi-instrumentalist best known for his work with Buffalo Springfield and Crosby, Stills, Nash & Young. Beginning his professional career with Buffalo Springfield, he composed one of their few hits "For What It's Worth," which became one of the most recognizable songs of the 1960s. Other notable songs he contributed to the band were "Sit Down, I Think I Love You
Context: Stills, Furay, and Young reunited in Los Angeles and formed the core of Buffalo Springfield. Legend has it that Stills and Furay recognized Young's converted hearse on the streets of LA and flagged him down, a meeting described in a recent solo track "Round the Bend." The band would release three albums: Buffalo Springfield, Buffalo Springfield Again, and Last Time Around, and enjoy only one hit single, the Stills-penned "For What It's Worth" before disbanding. A Stills song from their debut album, "Sit Down, I Think I Love You," was a minor hit for the Mojo Men in 1967. During the disintegration of Buffalo Springfield, Stills played on the Super Session album with Al Kooper and joined up with David Crosby, who had recently been ejected from the Byrds in the autumn of 1967. At a party in Laurel Canyon, Crosby was introduced to Graham Nash by a mutual friend, Cass Elliot (formerly of the Mamas and the Papas), and Nash found himself soon joining in singing with Crosby and Stills. Renditions of the latter's "You Don't Have to Cry," led to the formation of Crosby, Stills & Nash. Several of Stills's songs, including "Suite: Judy Blue Eyes" and "You Don't Have To Cry" on the debut album were inspired by his on-again-off-again relationship with singer Judy Collins. In a 1971 interview in Rolling Stone the interviewer noted, "so many of your songs seem to be about Judy Collins." Stills replied, "Well, there are three things men can do with women: love them, suffer for them, or turn them into literature. I've had my share of success and failure at all three." The cover photo pictured on the debut was taken on the back porch of a house in West Hollywood, which was torn down the next day. Wanting to be able to tour and needing additional musicians, the band invited Neil Young to join them for their subsequent tour and second album to make the group the quartet Crosby Stills Nash & Young. Having played at the Monterey Pop Festival with Buffalo Springfield, and both Woodstock and Altamont with CSNY, Stills performed at all three of the iconic U.S. rock festivals of the 1960s.
Question: How long was the group together for?
Answer:

Background: Junius Richard Jayewardene (Sinhalese: juniys ricdd jyvrdhn,Tamil: juunnniys ricctt jyvrtnnnaa; 17 September 1906 - 1 November 1996), commonly abbreviated in Sri Lanka as J. R., was the leader of Sri Lanka from 1977 to 1989, serving as Prime Minister from 1977 to 1978 and as the second President of Sri Lanka from 1978 till 1989. He was a leader of the nationalist movement in Ceylon (now Sri Lanka) who served in a variety of cabinet positions in the decades following independence.
Context: On the economic front, Jayewardene's legacy was decisive. For thirty years after independence, Sri Lanka had struggled in vain with slow growth and high unemployment. Since Jayewardene's reforms, the island has maintained healthy growth despite the civil war. On the ethnic question, Jayewardene's legacy is bitterly divisive. When he took office, ethnic tensions were present but the country as a whole was at peace. By the end of his tenure, Sri Lanka was facing not one but two civil wars, both featuring unprecedented levels of violence and brutality. Though Jayewardene indeed did not take measures to stop the attack on Tamils, he was not opposed to them personally, only politically. One of his most esteemed friends was a supreme court judge of Tamil ethnicity, a member of an elite family and raised in Colombo, but who was strongly linked to his Jaffna Tamil heritage. This is but one close Tamil friend of the president's, and it is quite clear that he was not a racist but rather a man who knew how to exploit racism to win the majority. Highly respected in Japan for his call for peace and reconciliation with post-war Japan at the Peace Conference in San Francisco in 1951, a statue of Jayewardene was erected at the Kamakura Temple in the Kanagawa Prefecture in Japan in his honor. In 1988, the J.R Jayewardene Centre was established by the J.R Jayewardene Centre Act No. 77 of 1988 by Parliament at the childhood home of J. R. Jayewardene Dharmapala Mawatha, Colombo. It serves as archive for J.R Jayewardene's personal library and papers as well as papers, records from the Presidential Secretariat and gifts he received in his tenure as President.
Question: did he help with the tensions?
Answer:
Though Jayewardene indeed did not take measures to stop the attack on Tamils, he was not opposed to them personally, only politically.