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: Sino-Soviet border agreements of the 1980s | Statement: [Treaty on the Russian-Chinese Border (1991), follows, Sino-Soviet border agreements of the 1980s]

Target entity: Sino-Soviet border agreements of the 1980s
Context triple: [Treaty on the Russian-Chinese Border (1991), follows, Sino-Soviet border agreements of the 1980s]

• A. Sino–Soviet border negotiations of the 1970s
  The Sino–Soviet border negotiations of the 1970s were a series of diplomatic talks between China and the Soviet Union aimed at easing tensions and resolving longstanding territorial disputes along their shared frontier after years of armed confrontation.
• B. Treaty on the Russian-Chinese Border (1991)
  The Treaty on the Russian-Chinese Border (1991) is a post–Cold War agreement that settled major sections of the long-disputed frontier between Russia and China, laying groundwork for improved bilateral relations and later border accords.
• C. Soviet–Mongolian border agreements (20th century)
  The Soviet–Mongolian border agreements of the 20th century were a series of treaties that formally defined and adjusted the frontier between the Soviet Union and Mongolia, shaping the modern boundary between Mongolia and Russia.
• D. Sino–Soviet Treaty of Friendship and Alliance (1945)
  The Sino–Soviet Treaty of Friendship and Alliance (1945) was a World War II–era agreement between the Republic of China and the Soviet Union that secured Soviet recognition of Chinese sovereignty over Manchuria and Mongolia in exchange for political and military concessions, shaping postwar power dynamics in East Asia.
• E. Soviet Union–China border chosen
  The Soviet Union–China border was the extensive international boundary that once separated the USSR from the People’s Republic of China across Central and East Asia before the Soviet Union’s dissolution.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.