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: Martin Van Buren | Statement: [1840 United States presidential election, isIncumbentCandidate, Martin Van Buren]

Target entity: Martin Van Buren
Context triple: [1840 United States presidential election, isIncumbentCandidate, Martin Van Buren]

• A. Martin Van Buren chosen
  Martin Van Buren was the eighth president of the United States, a key architect of the Democratic Party and close ally of Andrew Jackson, whose presidency was marked by the Panic of 1837 and the continuation of Jacksonian policies.
• B. Abraham Van Buren
  Abraham Van Buren was the eldest son of U.S. President Martin Van Buren, who served as his father's private secretary and acted as an informal White House host during his presidency.
• C. John Van Buren
  John Van Buren was an American lawyer, politician, and influential Democratic leader in New York, known as the son of President Martin Van Buren and a prominent figure in mid-19th-century politics.
• D. Jim Polk
  Jim Polk is an American writer and former spouse of acclaimed Canadian author Margaret Atwood.
• E. Fillmore
  Fillmore is a small agricultural city in Ventura County, California, known for its historic downtown and citrus and avocado groves.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target predicate: isIncumbentCandidate
Context triple: [1840 United States presidential election, isIncumbentCandidate, Martin Van Buren]

• A. hasIncumbentPresidentCandidate
  Indicates that a political entity (such as a party, election, or race) has a current office-holding president running as a candidate in that contest.
• B. incumbent
  Indicates that an entity currently holds a particular position, office, or role at the present time.
• C. incumbentBeforeElection chosen
  Indicates that the subject was already holding the relevant office or position prior to the specified election.
• D. lastIncumbent
  Indicates that the subject is the most recent person or entity to have held a particular position, office, or role before the current one.
• E. incumbentOpponent
  Indicates that one entity is the current officeholder while the other is their electoral challenger for that same position.
• F. None of above.