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: Great Migration era | Statement: [Backwater Blues, hasHistoricalContext, Great Migration era]

Target entity: Great Migration era
Context triple: [Backwater Blues, hasHistoricalContext, Great Migration era]

• A. Great Migration
  The Great Migration is a massive annual movement of millions of wildebeest, zebras, and other herbivores across the Serengeti–Maasai Mara ecosystem in search of fresh grazing and water.
• B. Great Migration
  The Great Migration was a massive movement of various peoples and tribes across Europe during the late antiquity period, which significantly reshaped the continent’s demographic and political landscape.
• C. Great Migration of African Americans out of the region chosen
  The Great Migration of African Americans out of the region was a massive, decades-long movement of Black Southerners to Northern, Midwestern, and Western cities in search of better economic opportunities and escape from Jim Crow segregation and racial violence.
• D. Great Migration of Puritans
  The Great Migration of Puritans was a large-scale movement of English Protestants to New England in the early 17th century, driven by religious and political tensions in England and resulting in the establishment of enduring Puritan communities in North America.
• E. Reconstruction era
  The Reconstruction era was the period following the American Civil War when the United States attempted to reintegrate the seceded Southern states and redefine the legal and social status of formerly enslaved people.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.