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 Antonovich of Brunswick | Statement: [Anna Leopoldovna, child, Alexei Antonovich of Brunswick]

Target entity: Alexei Antonovich of Brunswick
Context triple: [Anna Leopoldovna, child, Alexei Antonovich of Brunswick]

• A. Grand Duke Alexander Mikhailovich of Russia
  Grand Duke Alexander Mikhailovich of Russia was a Romanov dynast, naval officer, and influential advisor to the last Russian emperor Nicholas II, known for his role in modernizing the Imperial Russian Navy and his writings in exile after the Revolution.
• B. Grand Duke Peter Nikolaevich of Russia
  Grand Duke Peter Nikolaevich of Russia was a Romanov prince and high-ranking member of the Russian imperial family who lived in exile after the Russian Revolution.
• C. Grand Duke Sergei Mikhailovich of Russia
  Grand Duke Sergei Mikhailovich of Russia was a Romanov grand duke and Russian imperial military commander who served as Inspector General of Artillery during the late Russian Empire and was executed by the Bolsheviks after the Revolution.
• D. Grand Duke Andrei Vladimirovich of Russia
  Grand Duke Andrei Vladimirovich of Russia was a Romanov prince and military officer who lived in exile after the Russian Revolution and was known for his controversial morganatic marriage to the ballerina Mathilde Kschessinska.
• E. Grand Duke Paul Alexandrovich of Russia
  Grand Duke Paul Alexandrovich of Russia was a younger son of Emperor Alexander II who became a prominent, though often scandal-embroiled, member of the late Romanov imperial family and a general in the Russian army.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Alexei Antonovich of Brunswick
Triple: [Anna Leopoldovna, child, Alexei Antonovich of Brunswick]

Alexei Antonovich of Brunswick was a Russian imperial prince and briefly the de facto heir to the Russian throne as the son of regent Anna Leopoldovna and Duke Anthony Ulrich of Brunswick.

Target entity: Alexei Antonovich of Brunswick
Target entity description: Alexei Antonovich of Brunswick was a Russian imperial prince and briefly the de facto heir to the Russian throne as the son of regent Anna Leopoldovna and Duke Anthony Ulrich of Brunswick.

• A. Grand Duke Alexander Mikhailovich of Russia
  Grand Duke Alexander Mikhailovich of Russia was a Romanov dynast, naval officer, and influential advisor to the last Russian emperor Nicholas II, known for his role in modernizing the Imperial Russian Navy and his writings in exile after the Revolution.
• B. Grand Duke Peter Nikolaevich of Russia
  Grand Duke Peter Nikolaevich of Russia was a Romanov prince and high-ranking member of the Russian imperial family who lived in exile after the Russian Revolution.
• C. Grand Duke Sergei Mikhailovich of Russia
  Grand Duke Sergei Mikhailovich of Russia was a Romanov grand duke and Russian imperial military commander who served as Inspector General of Artillery during the late Russian Empire and was executed by the Bolsheviks after the Revolution.
• D. Grand Duke Andrei Vladimirovich of Russia
  Grand Duke Andrei Vladimirovich of Russia was a Romanov prince and military officer who lived in exile after the Russian Revolution and was known for his controversial morganatic marriage to the ballerina Mathilde Kschessinska.
• E. Grand Duke Paul Alexandrovich of Russia
  Grand Duke Paul Alexandrovich of Russia was a younger son of Emperor Alexander II who became a prominent, though often scandal-embroiled, member of the late Romanov imperial family and a general in the Russian army.
• F. None of above. chosen