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: Robert of Mortain | Statement: [Herleva of Falaise, child, Robert of Mortain]

Target entity: Robert of Mortain
Context triple: [Herleva of Falaise, child, Robert of Mortain]

• A. Robert, Count of Mortain chosen
  Robert, Count of Mortain was a powerful Norman nobleman, half-brother of William the Conqueror, who played a key role in the Norman Conquest of England and became one of the largest landholders in the country.
• B. William d'Aubigny
  William d'Aubigny was a 13th-century English nobleman and rebel baron who played a prominent role in the conflicts against King John, including the events surrounding the siege of Rochester Castle.
• C. Ranulf le Meschin
  Ranulf le Meschin was an Anglo-Norman nobleman and military leader of the early 12th century who became Earl of Chester and played a key role in consolidating Norman control in northern England.
• D. John, Count of Mortain
  John, Count of Mortain was the Angevin prince who later became King John of England, notorious for his troubled reign and the sealing of Magna Carta in 1215.
• E. Walter FitzRobert
  Walter FitzRobert was a 12th-century Anglo-Norman nobleman and landholder, known as a prominent member of the influential FitzWalter family in medieval England.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.