190814
In the Vietnam War , after the assassination s of Ngo Dinh Diem and John F. Kennedy in late 1963 and the Gulf of Tonkin Incident in 1964 and the continuing political instability in the South , the United States made a policy commitment to begin joint warfare in South Vietnam , a period of gradual escalation and Americanization , involving the commitment of large-scale combat forces from the United States and allied countries .
 location: Vietnam; person: Ngo Dinh Diem; person: John F. Kennedy; location: Vietnam
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Vietnam, Ngo Dinh Diem, John F. Kennedy, Vietnam 
Answer:
 location: Vietnam; person: Ngo Dinh Diem; person: John F. Kennedy; location: Vietnam