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: Kamakura period | Statement: [Emperor Kameyama, era, Kamakura period]

Target entity: Kamakura period
Context triple: [Emperor Kameyama, era, Kamakura period]

• A. Kamakura period chosen
  The Kamakura period was a pivotal era in Japanese history (1185–1333) marked by the rise of the samurai class and the establishment of the first shogunate government in Kamakura.
• B. Muromachi period
  The Muromachi period was a Japanese historical era (1336–1573) marked by Ashikaga shogunate rule, flourishing arts such as Noh and ink painting, and the growth of prosperous merchant cities like Sakai.
• C. Nanboku-chō period
  The Nanboku-chō period was a turbulent era in Japanese history (1336–1392) marked by the rivalry between the Northern and Southern imperial courts and prolonged civil war over legitimate imperial succession.
• D. Heian period
  The Heian period was a classical era of Japanese history (794–1185) marked by an imperial court-centered culture, flourishing literature such as The Tale of Genji, and the development of a distinct Japanese aesthetic.
• E. Yamato period
  The Yamato period was an early era of Japanese history (roughly 3rd to 7th century) marked by the political consolidation of the Yamato clan, the emergence of a centralized state, and the introduction of Buddhism and Chinese cultural influences.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.