Question: what is the host nation of the 2004 summer olympic games
Answer: The 2004 Summer Olympic Games ( Greek : Θερινοί Ολυμπιακοί Αγώνες 2004 , Therinoí Olympiakoí Agó̱nes 2004 ) , officially known as the Games of the XXVIII Olympiad and commonly known as Athens 2004 , was a premier international multi-sport event held in Athens , Greece , from 13 to 29 August 2004 with the motto Welcome Home .