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: Walder Rivers | Statement: [House Frey, notableMember, Walder Rivers]

Target entity: Walder Rivers
Context triple: [House Frey, notableMember, Walder Rivers]

• A. Denys Arryn
  Denys Arryn is a nobleman of the Vale from George R. R. Martin’s A Song of Ice and Fire series, belonging to the storied and influential House Arryn.
• B. Vyvyan Basterd
  Vyvyan Basterd is the violently anarchic, metal-loving medical student from the British sitcom "The Young Ones," known for his punk appearance and destructive behavior.
• C. Edward Kent
  Edward Kent was a 19th-century American politician who served as governor of Maine and later as a U.S. diplomat.
• D. Walter Cromwell
  Walter Cromwell was an English brewer, blacksmith, and innkeeper of Putney, best known as the father of Thomas Cromwell, chief minister to King Henry VIII.
• E. Henry Brandon
  Henry Brandon was a character actor best known for his villainous roles in classic Hollywood films, including his memorable portrayal of the Comanche chief Scar in "The Searchers."
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Walder Rivers
Triple: [House Frey, notableMember, Walder Rivers]

Walder Rivers is a prominent bastard son of Lord Walder Frey in George R.R. Martin’s "A Song of Ice and Fire," known for his ruthlessness and role in the Frey family's schemes.

Target entity: Walder Rivers
Target entity description: Walder Rivers is a prominent bastard son of Lord Walder Frey in George R.R. Martin’s "A Song of Ice and Fire," known for his ruthlessness and role in the Frey family's schemes.

• A. Denys Arryn
  Denys Arryn is a nobleman of the Vale from George R. R. Martin’s A Song of Ice and Fire series, belonging to the storied and influential House Arryn.
• B. Vyvyan Basterd
  Vyvyan Basterd is the violently anarchic, metal-loving medical student from the British sitcom "The Young Ones," known for his punk appearance and destructive behavior.
• C. Edward Kent
  Edward Kent was a 19th-century American politician who served as governor of Maine and later as a U.S. diplomat.
• D. Walter Cromwell
  Walter Cromwell was an English brewer, blacksmith, and innkeeper of Putney, best known as the father of Thomas Cromwell, chief minister to King Henry VIII.
• E. Henry Brandon
  Henry Brandon was a character actor best known for his villainous roles in classic Hollywood films, including his memorable portrayal of the Comanche chief Scar in "The Searchers."
• F. None of above. chosen