Individual #Gulf_of_Guinea  a gulf off the southwest coast of Africa
  instance of:  gulf
  part of:  Atlantic_Ocean
  part:  Bioko  an island in the Gulf of Guinea that is part of Equatorial Guinea
     part:  Malabo  the capital and largest city of Equatorial Guinea on the island of Bioko in the Gulf of Guinea
  part:  Bight_of_Benin  a broad indentation of the Gulf of Guinea in western Africa

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