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: Iron Curtain border until 1989 (Austria–Czechoslovakia) | Statement: [Austria and Slovakia, historicalEventContext, Iron Curtain border until 1989 (Austria–Czechoslovakia)]

Target entity: Iron Curtain border until 1989 (Austria–Czechoslovakia)
Context triple: [Austria and Slovakia, historicalEventContext, Iron Curtain border until 1989 (Austria–Czechoslovakia)]

• A. Austria–Czechoslovakia border chosen
  The Austria–Czechoslovakia border was a Cold War-era frontier separating neutral Austria from the communist state of Czechoslovakia, forming part of the dividing line between Western and Eastern Europe.
• B. Czechoslovakia–West Germany border
  The Czechoslovakia–West Germany border was a heavily fortified Cold War frontier separating the communist Eastern Bloc from democratic Western Europe.
• C. inner German border
  The inner German border was the heavily fortified frontier that separated East and West Germany during the Cold War, symbolizing the division of Europe.
• D. Czechoslovakia–Hungary border
  The Czechoslovakia–Hungary border was the former international boundary between Czechoslovakia and Hungary that existed in the 20th century before the dissolution of Czechoslovakia and the creation of modern Slovakia.
• E. German-Czech border
  The German-Czech border is an international boundary in Central Europe that largely follows natural features such as the Ore Mountains, separating Germany from the Czech Republic.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.