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: Congress of Vienna 1814–1815 | Statement: [Klemens von Metternich, participantIn, Congress of Vienna 1814–1815]

Target entity: Congress of Vienna 1814–1815
Context triple: [Klemens von Metternich, participantIn, Congress of Vienna 1814–1815]

• A. Congress of Vienna chosen
  The Congress of Vienna was an international diplomatic conference held in 1814–1815 that redrew the map of Europe and established a balance-of-power system after the defeat of Napoleon.
• B. Concert of Europe
  The Concert of Europe was a 19th-century diplomatic system in which the major European powers cooperated to maintain the balance of power and suppress revolutionary movements after the Napoleonic Wars.
• C. Westphalian peace congress
  The Westphalian peace congress was the series of diplomatic negotiations held in 1640s Münster and Osnabrück that produced the Peace of Westphalia, ending the Thirty Years' War and reshaping the political order of Europe.
• D. Congress of Berlin
  The Congress of Berlin was an 1878 diplomatic meeting of the great European powers that redrew the map of the Balkans and revised the Treaty of San Stefano following the Russo-Turkish War.
• E. Laibach Congress 1821
  The Laibach Congress of 1821 was a meeting of the Holy Alliance powers in the city of Laibach (now Ljubljana) to coordinate conservative intervention against revolutionary movements in Europe.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.