If the measure is put on the ballot, progressive groups expect to mobilize tens of thousands of voters to support the initiative, said Bill Holland, director of the New Jersey Working Families Alliance.

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Ministers and industry bosses have planned for this, approving an upgrade to the big Zeebrugge-Bacton pipeline that links Britain to the continent, and the construction of new lines from Norway and Holland.

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Michigan is beginning to see some signs of new life: perennial cellar dweller Holland-Grand Haven rose a remarkable 202 places to 19th on the overall list.

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"People from all over the world are coming to live in Holland, so you have to make new forms of living together, " he said.

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The event will end with a new version of the National Anthem, featuring calypso-style drumming and Holland on piano.

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The exhibition runs until 2 June, when it moves to Atlanta's High Museum of Art and then in October to the Frick Collection in New York City before returning home to Holland.

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