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: Sand River Convention | Statement: [South African Republic, eventStart, Sand River Convention]

Target entity: Sand River Convention
Context triple: [South African Republic, eventStart, Sand River Convention]

• A. Sand River Convention chosen
  The Sand River Convention was an 1852 agreement by which Britain recognized the independence of the Boer settlers in the Transvaal region of southern Africa.
• B. Horse Creek Treaty
  The Horse Creek Treaty was an 1851 agreement between the United States and several Plains Indian nations that aimed to establish territorial boundaries and ensure safe passage for settlers moving west.
• C. Treaty of Buffalo Creek
  The Treaty of Buffalo Creek was an 1838 agreement between the United States and several Iroquois nations that sought to remove them from their remaining lands in New York to reservations in the West, leading to major land losses and long-term legal disputes.
• D. Treaty 11
  Treaty 11 is the last of Canada’s historic Numbered Treaties, signed in the early 1920s with Indigenous peoples in the Northwest Territories to secure land for resource development and settlement.
• E. Treaty of Big Tree
  The Treaty of Big Tree was an 1797 agreement in which the Seneca Nation ceded most of its remaining lands in western New York to the United States, profoundly reshaping their territory and future.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.