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: Alaska Purchase treaty | Statement: [United States territorial expansion, significantEvent, Alaska Purchase treaty]

Target entity: Alaska Purchase treaty
Context triple: [United States territorial expansion, significantEvent, Alaska Purchase treaty]

• A. Alaska Purchase chosen
  The Alaska Purchase was the 1867 transaction in which the United States bought the Alaska territory from the Russian Empire, significantly expanding U.S. land holdings in North America.
• B. Gadsden Purchase agreement
  The Gadsden Purchase agreement was an 1853 treaty between the United States and Mexico in which the U.S. bought a strip of land in present-day southern Arizona and New Mexico to facilitate a southern transcontinental railroad and finalize the continental border.
• C. Treaty of Portsmouth
  The Treaty of Portsmouth was the 1905 peace agreement, mediated by U.S. President Theodore Roosevelt in New Hampshire, that ended the Russo-Japanese War and marked Japan’s emergence as a major world power.
• D. 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.
• E. Convention of 1818
  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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.