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: American Westward expansion | Statement: [Union Pacific Railroad Museum, hasSubject, American Westward expansion]

Target entity: American Westward expansion
Context triple: [Union Pacific Railroad Museum, hasSubject, American Westward expansion]

• A. United States territorial expansion
  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. Oregon territorial period
  The Oregon territorial period was the era from 1848 to 1859 when the region that would become the state of Oregon was governed as a U.S. territory with its own appointed and elected officials.
• C. Old West chosen
  The Old West refers to the 19th-century American frontier era characterized by westward expansion, cowboys, lawlessness, and conflicts between settlers, Native Americans, and outlaws.
• D. Anglo-American colonization of Texas
  Anglo-American colonization of Texas was the early 19th-century process by which settlers from the United States, led by empresarios like Stephen F. Austin, established Anglo communities in Mexican Texas, laying the groundwork for Texas independence.
• 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.