| http://www.w3.org/ns/prov#value | - The convention, seminar, or meeting is directly related to your trade or business.The cruise ship is a vessel registered in the United States.All of the cruise ship's ports of call are in the United States or in possessions of the United States.You attach to your return a written statement signed by you that includes information about:The total days of the trip (not including the days of transport
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