Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Vietnam War era | Statement: [1968 Indiana Democratic presidential primary, tookPlaceDuring, Vietnam War era]

Target entity: Vietnam War era
Context triple: [1968 Indiana Democratic presidential primary, tookPlaceDuring, Vietnam War era]

• A. Vietnam War chosen
  The Vietnam War was a protracted Cold War-era conflict in Southeast Asia, primarily between communist North Vietnam and U.S.-backed South Vietnam, that profoundly shaped global politics, military strategy, and American society.
• B. Tet Offensive
  The Tet Offensive was a major 1968 campaign of surprise attacks by North Vietnamese and Viet Cong forces across South Vietnam that dramatically shifted U.S. public opinion and marked a turning point in the Vietnam War.
• C. Cold War
  The Cold War was a prolonged period of geopolitical tension and ideological rivalry between the United States and its allies and the Soviet Union and its allies, spanning roughly from the late 1940s to the early 1990s.
• D. Gulf of Tonkin incident
  The Gulf of Tonkin incident was a 1964 naval confrontation between North Vietnam and the United States that led to a major escalation of U.S. military involvement in the Vietnam War.
• E. Operation Rolling Thunder
  Operation Rolling Thunder was a sustained U.S. aerial bombing campaign against North Vietnam from 1965 to 1968, aimed at weakening North Vietnamese capabilities and will to fight during the Vietnam War.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.