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Guy Verhofstadt served as Belgium's Prime Minister for 9 years, from 1999 to 2008. He was the leader of the Flemish liberal party Open VLD, and his government was a coalition of Open VLD, the Christian Democratic and Flemish Party, and the Socialist Party. Verhofstadt's government was known for its pro-European policies, and it played a leading role in the negotiations that led to the adoption of the Lisbon Treaty.