This image depicts
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United Air Lines (an airline)
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airmail flight cover: United Air Lines, Douglas DC-7, San Francisco - New York route (an object)
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United Airlines (a company)
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Douglas DC-7 (an aircraft)
- United Air Lines (an airline)
- airmail flight cover: United Air Lines, Douglas DC-7, San Francisco - New York route (an object)
- United Airlines (a company)
- Douglas DC-7 (an aircraft)