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: 1968 invasion of Czechoslovakia | Statement: [Bulgarian People's Army, participatedIn, 1968 invasion of Czechoslovakia]

Target entity: 1968 invasion of Czechoslovakia
Context triple: [Bulgarian People's Army, participatedIn, 1968 invasion of Czechoslovakia]

• A. Warsaw Pact invasion of Czechoslovakia chosen
  The Warsaw Pact invasion of Czechoslovakia was a 1968 military intervention by Soviet-led Eastern Bloc forces that crushed the liberalizing Prague Spring reforms and reasserted hardline communist control.
• B. Prague Spring
  Prague Spring was a brief period of political liberalization and reform in communist Czechoslovakia in 1968 that was ultimately crushed by a Soviet-led invasion.
• C. Czechoslovak coup d’état of 1948
  The Czechoslovak coup d’état of 1948 was a Communist Party–led takeover that ended multiparty democracy in Czechoslovakia and established a pro-Soviet communist regime at the start of the Cold War.
• D. 1968 Polish political crisis
  The 1968 Polish political crisis was a wave of student protests and subsequent government repression in communist Poland, marked by an anti-intellectual and antisemitic campaign that led to political purges and the emigration of thousands of Polish Jews.
• E. Liberation of western Czechoslovakia
  The Liberation of western Czechoslovakia was the final World War II campaign in which U.S. and other Western Allied forces freed the western regions of Czechoslovakia from Nazi German occupation in the spring of 1945.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.