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: [Fort Kearny, historicalEra, Westward expansion of the United States]

Target entity: Westward expansion of the United States
Context triple: [Fort Kearny, historicalEra, 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. Northern Expansion Doctrine
  The Northern Expansion Doctrine was an Imperial Japanese military and political strategy that advocated expansion into Siberia and the Soviet Far East to secure resources and strategic dominance.
• C. California annexation by the United States
  California annexation by the United States was the mid-19th-century process, culminating in the Mexican–American War and the 1848 Treaty of Guadalupe Hidalgo, by which the U.S. took control of Mexican Alta California and incorporated it into its territory.
• D. Southern Expansion Doctrine
  The Southern Expansion Doctrine was an early 20th-century Japanese imperialist strategy advocating political, economic, and military expansion into Southeast Asia and the Pacific.
• E. 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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.