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: Postclassic period | Statement: [Valley of Guatemala, historicalPeriodOfImportance, Postclassic period]

Target entity: Postclassic period
Context triple: [Valley of Guatemala, historicalPeriodOfImportance, Postclassic period]

• A. Postclassic period of Mesoamerica chosen
  The Postclassic period of Mesoamerica was the final pre-Columbian era (roughly 900–1521 CE) marked by intensified warfare, long-distance trade, urban centers, and powerful states such as the Aztec Empire.
• B. Late Classic period
  The Late Classic period was a flourishing era of Mesoamerican civilization, roughly spanning 600–900 CE, marked by the peak of Maya city-states and vibrant artistic, architectural, and political developments across the region.
• C. Epiclassic period
  The Epiclassic period was a transitional era in Mesoamerican history (roughly 600–900 CE) marked by the decline of major Classic centers and the rise of regional powers and distinctive artistic and architectural styles.
• D. Pre-Columbian era
  The Pre-Columbian era refers to the period in the Americas before the arrival of Christopher Columbus and subsequent European contact, characterized by diverse and complex Indigenous civilizations and cultures.
• E. Early Classic period
  The Early Classic period was a formative era in Mesoamerican history, roughly spanning 250–600 CE, marked by the rise and florescence of major urban centers such as Teotihuacan and the early development of Classic Maya civilization.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.