Individual #Arabian_Sea  a northwestern arm of the Indian Ocean between India and Arabia
  instance of:  sea
  part of:  Indian_Ocean
  part:  Gulf_of_Oman  an arm of the Arabian Sea connecting it with the Persian Gulf
  part:  Persian_Gulf  a shallow arm of the Arabian Sea between Iran and the Arabian peninsula; the Persian Gulf oil fields are among the most productive in the world
     part:  Bahrain_Island__Bahrain__Bahrein__Bahrein_Island  an island in the Persian Gulf

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