| http://www.w3.org/ns/prov#value | - The first is to sell at auction the right to land an aircraft at a particular airport at a particular time; that right is called a ???landing slot.??? In an auction an airport would first determine the number of landings it can accommodate during a given period of time, such as an hour, and then allow airlines to bid for each slot in an auction; the winning bid would determine the price of the lan
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