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: [Griffiss Air Force Base, usedDuring, Vietnam War era]

Target entity: Vietnam War era
Context triple: [Griffiss Air Force Base, usedDuring, 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. post-Tet Offensive phase of Vietnam War
  The post-Tet Offensive phase of the Vietnam War was the period after early 1968 marked by declining U.S. public support, a shift toward Vietnamization and troop withdrawals, and an eventual move from large-scale American combat operations to negotiated settlement and disengagement.
• C. Vietnamization
  Vietnamization was a U.S. strategy during the Vietnam War that sought to shift combat responsibilities to South Vietnamese forces while gradually withdrawing American troops.
• D. Vietnam War gallery
  The Vietnam War gallery is a dedicated exhibit at the National Museum of the Marine Corps that immersively portrays U.S. Marine Corps operations, experiences, and artifacts from the Vietnam War era.
• E. 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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.