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: Walter Sisulu | Statement: [Robben Island, notablePrisoner, Walter Sisulu]

Target entity: Walter Sisulu
Context triple: [Robben Island, notablePrisoner, Walter Sisulu]

• A. Ahmed Kathrada
  Ahmed Kathrada was a prominent South African anti-apartheid activist, close associate of Nelson Mandela, and long-serving political prisoner who later became a key figure in the post-apartheid government.
• B. Yusuf Dadoo
  Yusuf Dadoo was a prominent South African Indian anti-apartheid leader, physician, and communist activist who played a key role in uniting Indian and African resistance against racial segregation.
• C. Trevor Thamsanqa Tutu
  Trevor Thamsanqa Tutu is a South African figure best known as the son of Nobel Peace Prize–winning anti-apartheid activist and Anglican Archbishop Desmond Tutu.
• D. Nelson Mandela
  Nelson Mandela was a South African anti-apartheid revolutionary, political leader, and Nobel Peace Prize laureate who became the country’s first Black president and a global symbol of reconciliation and justice.
• E. Lobengula Khumalo
  Lobengula Khumalo was the second and last king of the Ndebele (Matabele) Kingdom in what is now Zimbabwe, known for his resistance to British colonial encroachment in the late 19th century.
• 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: Walter Sisulu
Triple: [Robben Island, notablePrisoner, Walter Sisulu]

Walter Sisulu was a prominent South African anti-apartheid activist and African National Congress leader who played a key role in the struggle against white minority rule and was imprisoned for many years alongside Nelson Mandela.

Target entity: Walter Sisulu
Target entity description: Walter Sisulu was a prominent South African anti-apartheid activist and African National Congress leader who played a key role in the struggle against white minority rule and was imprisoned for many years alongside Nelson Mandela.

• A. Ahmed Kathrada
  Ahmed Kathrada was a prominent South African anti-apartheid activist, close associate of Nelson Mandela, and long-serving political prisoner who later became a key figure in the post-apartheid government.
• B. Yusuf Dadoo
  Yusuf Dadoo was a prominent South African Indian anti-apartheid leader, physician, and communist activist who played a key role in uniting Indian and African resistance against racial segregation.
• C. Trevor Thamsanqa Tutu
  Trevor Thamsanqa Tutu is a South African figure best known as the son of Nobel Peace Prize–winning anti-apartheid activist and Anglican Archbishop Desmond Tutu.
• D. Nelson Mandela
  Nelson Mandela was a South African anti-apartheid revolutionary, political leader, and Nobel Peace Prize laureate who became the country’s first Black president and a global symbol of reconciliation and justice.
• E. Lobengula Khumalo
  Lobengula Khumalo was the second and last king of the Ndebele (Matabele) Kingdom in what is now Zimbabwe, known for his resistance to British colonial encroachment in the late 19th century.
• F. None of above. chosen