Which archipelago in the North Sea belonged to Britain until 1990 when ownership passed to Germany?
HELIGOLAND British Administration of Heligoland Hellgoland Helgoland Helgioland Helgoland Power Cable Island of Helgoland Heligoland British Heligoland
island of helgoland helgoland power cable british heligoland helgioland british administration of heligoland heligoland helgoland hellgoland
heligoland
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HELIGOLAND