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: Alexei Nikolaevich, Tsarevich of Russia | Statement: [Tatiana Nikolaevna of Russia, sibling, Alexei Nikolaevich, Tsarevich of Russia]

Target entity: Alexei Nikolaevich, Tsarevich of Russia
Context triple: [Tatiana Nikolaevna of Russia, sibling, Alexei Nikolaevich, Tsarevich of Russia]

• A. Alexei Nikolaevich, Tsarevich of Russia chosen
  Alexei Nikolaevich, Tsarevich of Russia, was the hemophiliac heir apparent and only son of Tsar Nicholas II, whose assassination with his family in 1918 marked the end of the Russian imperial dynasty.
• B. Alexei Petrovich, Tsarevich of Russia
  Alexei Petrovich, Tsarevich of Russia, was the ill-fated heir to the Russian throne whose conflict with his father Peter the Great led to his arrest, torture, and death in custody.
• C. Tsarevich Ivan Alexeyevich of Russia
  Tsarevich Ivan Alexeyevich of Russia was the eldest son and heir apparent of Tsar Alexei Mikhailovich, whose early death paved the way for his half-brother Peter the Great’s eventual rise to the Russian throne.
• D. Tsarevich Alexei Alexeyevich of Russia
  Tsarevich Alexei Alexeyevich of Russia was the eldest son and heir apparent of Tsar Alexei Mikhailovich, whose early death in 1670 altered the line of succession in the Romanov dynasty.
• E. Tsarevich Dmitry Ivanovich
  Tsarevich Dmitry Ivanovich was the youngest son of Ivan the Terrible whose mysterious death in childhood later sparked the appearance of pretenders, most notably False Dmitry I, during Russia’s Time of Troubles.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.