Simplify the following text for a Grade 9 native English-speaking person.
Original: DÃ 1\/4 sseldorf International Airport is an airport located eight kilometres from DÃ 1\/4 sseldorf , Germany .
Simplified: Messe DÃ 1\/4 sseldorf is situated in close proximity to DÃ 1\/4 sseldorf Airport City ( some 500 m ) .