European Union representation within those institutions, a practice often referred to as "pooling of sovereignty". To become a member, a country must meet the Copenhagen criteria, defined at the 1993 meeting of the European Council in Copenhagen. These require a stable democracy that respects human rights and the rule of law; a functioning market economy; and the acceptance of the obligations of membership, including EU law. Evaluation of a country's fulfilment of the criteria is the responsibility of the European Council. No member state has yet left the Union, although Greenland (an autonomous province of Denmark) withdrew in 1985. Article 50 of
Greenland Eurovision Song Contest 1979, performing in Greenlandic. The singer-songwriter Simon Lynge is the first musical artist from Greenland to have an album released across the United Kingdom, and to perform at the UK's Glastonbury Festival. The music culture of Greenland also includes traditional Inuit music, largely revolving around singing and drums. Sport is an important part of Greenlandic culture, as the population is generally quite active. Popular sports include association football, track and field, handball and skiing. Handball is often referred to as the national sport, and Greenland's men's national team was ranked among the top 20 in the world