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Nigerian football fans raise their chairs to celebrate Nigeria's goal against Mali during the first semi-final football match between the two teams at a public viewing centre in Lagos, on February 6, 2013. Nigeria defeated Mali 4 - 1 to qualify for the final of the 2013 African Cup of Nations in Durban. AFP PHOTO/PIUS UTOMI EKPEIPIUS UTOMI EKPEI/AFP/Getty Images

World's best and worst cities to live in

Melbourne holds the top spot as the most livable city for the third year

in a row, according a report by the Economist Intelligence Unit. The

study, based on 30 factors such as quality of health care and threat of

military conflict, ranked 140 cities.