input: In 1947, Heyerdahl and five fellow adventurers sailed from Peru to the Tuamotu Islands, French Polynesia in a pae-pae raft that they had constructed from balsa wood and other native materials, christened the Kon-Tiki. The Kon-Tiki expedition was inspired by old reports and drawings made by the Spanish Conquistadors of Inca rafts, and by native legends and archaeological evidence suggesting contact between South America and Polynesia. The Kon-Tiki smashed into the reef at Raroia in the Tuamotus on August 7, 1947, after a 101-day, 4,300-nautical-mile (5,000-mile or 8,000 km) journey across the Pacific Ocean. Heyerdahl had nearly drowned at least twice in childhood and did not take easily to water; he said later that there were times in each of his raft voyages when he feared for his life.  Kon-Tiki demonstrated that it was possible for a primitive raft to sail the Pacific with relative ease and safety, especially to the west (with the trade winds). The raft proved to be highly manoeuvrable, and fish congregated between the nine balsa logs in such numbers that ancient sailors could have possibly relied on fish for hydration in the absence of other sources of fresh water. Other rafts have repeated the voyage, inspired by Kon-Tiki. Heyerdahl's book about The Kon-Tiki Expedition: By Raft Across the South Seas has been translated into 70 languages. The documentary film of the expedition entitled Kon-Tiki won an Academy Award in 1951. A dramatised version was released in 2012, also called Kon-Tiki, and was nominated for both the Best Foreign Language Oscar at the 85th Academy Awards and a Golden Globe Award for Best Foreign Language Film at the 70th Golden Globe Awards. It was the first time that a Norwegian film was nominated for both an Oscar and a Golden Globe.  Anthropologists continue to believe that Polynesia was settled from west to east, based on linguistic, physical, and genetic evidence, migration having begun from the Asian mainland. There are controversial indications, though, of some sort of South American/Polynesian contact, most notably in the fact that the South American sweet potato is served as a dietary staple throughout much of Polynesia. Blood samples taken in 1971 and 2008 from Easter Islanders without any European or other external descent were analysed in a 2011 study, which concluded that the evidence supported some aspects of Heyerdahl's hypothesis. This result has been questioned because of the possibility of contamination by South Americans after European contact with the islands. However, more recent DNA work (after Heyerdahl's death) contradicts the post-European-contact contamination hypothesis, finding the South American DNA sequences to be far older than that. Heyerdahl had attempted to counter the linguistic argument with the analogy that he would prefer to believe that African-Americans came from Africa, judging from their skin colour, and not from England, judging from their speech.

Answer this question "when did he write his book?"
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Question: Tatchell was born in Melbourne, Australia. His father was a lathe operator and his mother worked in a biscuit factory. His parents divorced when he was four and his mother remarried soon afterwards. Since the family finances were strained by medical bills, he had to leave school at 16 in 1968.

To avoid conscription into the Australian Army, Tatchell moved to London in 1971. He had accepted being gay in 1969, and in London became a leading member of the Gay Liberation Front (GLF) until its 1974 collapse. During this time Tatchell was prominent in organising sit-ins at pubs that refused to serve "poofs" and protests against police harassment and the medical classification of homosexuality as an illness. With others he helped organise Britain's first Gay Pride march in 1972.  In 1973, he attended the 10th World Youth Festival in East Berlin on GLF's behalf. His actions triggered opposition within and between different groups of national delegates including the Communist Party of Great Britain and National Union of Students. He was banned from conferences, had his leaflets confiscated and burned, was interrogated by the secret police (the Stasi) and threatened and assaulted by other delegates, mostly communists.  Tatchell later claimed that this was the first time gay liberation politics were publicly disseminated and discussed in a communist country, although he noted that, in terms of decriminalisation and the age of consent, gay men had greater rights in East Germany at the time than in Britain and much of the West.  Describing his time in the Gay Liberation Front, he wrote in The Guardian that:  [The] GLF was a glorious, enthusiastic and often chaotic mix of anarchists, hippies, leftwingers, feminists, liberals and counter-culturalists. Despite our differences, we shared a radical idealism - a dream of what the world could and should be - free from not just homophobia but the whole sex-shame culture, which oppressed straights as much as LGBTs. We were sexual liberationists and social revolutionaries, out to turn the world upside down. [...] GLF's main aim was never equality within the status quo. [...] GLF's strategy for queer emancipation was to change society's values and norms, rather than adapt to them. We sought a cultural revolution to overturn centuries of male heterosexual domination and thereby free both queers and women. [...] Forty years on, GLF's gender agenda has been partly won. [...] Girlish boys and boyish girls don't get victimised as much as in times past. LGBT kids often now come out at the age of 12 or 14. While many are bullied, many others are not. The acceptance of sexual and gender diversity is increasing.

Using a quote from the above article, answer the following question: What was the ideology of the GLF?
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Answer:
a dream of what the world could and should be - free from not just homophobia but the whole sex-shame culture,