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: Treaty of 1818 | Statement: [British Empire in the Pacific Northwest, usedLegalInstrument, Treaty of 1818]

Target entity: Treaty of 1818
Context triple: [British Empire in the Pacific Northwest, usedLegalInstrument, Treaty of 1818]

• A. Convention of 1818 chosen
  The Convention of 1818 was an agreement between the United States and Great Britain that settled parts of the U.S.-Canada boundary and established joint occupation of the Oregon Country.
• B. Oregon Treaty of 1846
  The Oregon Treaty of 1846 was an agreement between the United States and Great Britain that peacefully settled their competing claims in the Pacific Northwest by establishing the 49th parallel as the boundary west of the Rocky Mountains.
• C. Elgin–Marcy Treaty
  The Elgin–Marcy Treaty was an 1854 reciprocity agreement between the United Kingdom (for British North America) and the United States that reduced tariffs and promoted free trade in natural resources across the U.S.–Canadian border.
• D. Treaty of St. Marys (1818)
  The Treaty of St. Marys (1818) was a U.S.–Native American agreement in which the Miami and other tribes ceded large tracts of land in present-day Indiana and Ohio to the United States, facilitating American expansion in the Old Northwest.
• E. Adams–Onís Treaty
  The Adams–Onís Treaty was an 1819 agreement between the United States and Spain that ceded Florida to the U.S. and defined the boundary between U.S. and Spanish territories in North America.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.