Original sentence: Although the bombing has been described as a terrorist act, there is no consensus concerning who perpetrated it.At the time the hotel was the site of the Commonwealth Heads of Government Meeting (CHOGM), a biennial meeting of the heads of government from all Commonwealth nations.No one actually claimed responsibility for the terrorist act and there is controversy over whether the true perpetrators have yet to be discovered.Several foreign leaders were staying in the hotel at the time, but none were injured.The Sydney Hilton bombing occurred on 13 February, 1978, when a bomb exploded outside the Hilton Hotel in Sydney, Australia.The bomb, planted in a rubbish bin, exploded in a garbage truck outside the hotel at 1:40am.The bombing played a role in the 1982 trial and conviction of three members of the Ananda Marga sect -- Tim Anderson, Ross Dunn and Paul Alister -- on charges of an attempted assassination, which the prosecution associated with the Sydney Hilton bombing.Thereafter, Anderson was arrested for the Sydney Hilton bombing, but he was pardoned and released in 1989.They were pardoned and released in 1988
Edited sentence: "Despite clear evidence that they were innocent", according to The Guardian , Tim Anderson, Ross Dunn and Paul Alister, known as the Ananda Marga Three and members of the Ananda Marga sect, were jailed until 15 May 1985 for the bombing, before being pardoned after several inquiries.At the time of the bombing, the Commonwealth Heads of Government Meeting (CHOGM), a biennial meeting of the heads of government from all Commonwealth nations, was taking place in the Hilton Hotel and a number of foreign leaders were staying there.Decades later it is still unclear who perpetrated this act.No one actually claimed responsibility for the terrorist act and there is controversy over whether the true perpertrators have yet to be discovered.On 13 February 1978 at 1:40am a bomb planted in a rubbish bin exploded in a garbage truck outside the Hilton Hotel.The Sydney Hilton bombing is terrorist act which occured in 1978 in Sydney, Australia