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: Westward Expansion of the United States | Statement: [California Trail, partOf, Westward Expansion of the United States]

Target entity: Westward Expansion of the United States
Context triple: [California Trail, partOf, Westward Expansion of the United States]

• A. United States territorial expansion chosen
  United States territorial expansion refers to the historical process by which the United States grew from a cluster of Atlantic coast colonies into a transcontinental nation through purchases, wars, treaties, and settlement.
• B. Louisiana Purchase
  The Louisiana Purchase was an 1803 land deal in which the United States bought a vast territory from France, doubling the nation's size and securing control of the Mississippi River region.
• C. Indian Removal policy of the United States
  The Indian Removal policy of the United States was a 19th-century federal strategy that forcibly displaced Native American nations from their ancestral homelands in the East to territories west of the Mississippi River, leading to widespread suffering and events such as the Trail of Tears.
• D. Alaska Purchase
  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.
• E. Illinois frontier
  The Illinois frontier was the sparsely settled, contested border region of early Illinois where settlers, Native American nations, and military forces frequently clashed during westward expansion.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.