SELECT Name FROM ship WHERE Nationality != "United States"
List the name of ships whose nationality is not "United States".
[Schema (values) (types)]: | ship_mission |  mission : mission_id (text) , ship_id (number) , code (number) , launched_year (text) , location (number) , speed_knots (text) , fate (number) | ship : ship_id (text) , name (number) , type (number) , nationality (text) , tonnage (number);