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: Frederick William, Duke of Courland | Statement: [Anna of Russia, spouse, Frederick William, Duke of Courland]

Target entity: Frederick William, Duke of Courland
Context triple: [Anna of Russia, spouse, Frederick William, Duke of Courland]

• A. Frederick William, Elector of Brandenburg
  Frederick William, Elector of Brandenburg, was a 17th-century ruler known as the "Great Elector" for transforming Brandenburg-Prussia into a centralized, militarily powerful state and laying the foundations for future Prussian greatness.
• B. Frederick William II of Prussia
  Frederick William II of Prussia was King of Prussia from 1786 to 1797, known for his less militaristic rule than his predecessor Frederick the Great and for overseeing both territorial gains and growing internal weaknesses in the Prussian state.
• C. Frederick William I of Prussia
  Frederick William I of Prussia was the early 18th-century "Soldier King" who transformed Prussia into a highly militarized and efficiently administered state, laying the groundwork for its rise as a major European power.
• D. Frederick II of Prussia
  Frederick II of Prussia, also known as Frederick the Great, was an 18th-century Prussian king renowned for his military genius, enlightened absolutist rule, and transformation of Prussia into a major European power.
• E. Frederick I of Prussia
  Frederick I of Prussia was the first King in Prussia, known for elevating the Duchy of Prussia to a kingdom and promoting culture, science, and absolutist rule in the early 18th century.
• 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: Frederick William, Duke of Courland
Triple: [Anna of Russia, spouse, Frederick William, Duke of Courland]

Frederick William, Duke of Courland, was an 18th-century German prince of the House of Kettler who briefly ruled the Duchy of Courland and Semigallia and is chiefly remembered for his dynastic marriage to the future Empress Anna of Russia.

Target entity: Frederick William, Duke of Courland
Target entity description: Frederick William, Duke of Courland, was an 18th-century German prince of the House of Kettler who briefly ruled the Duchy of Courland and Semigallia and is chiefly remembered for his dynastic marriage to the future Empress Anna of Russia.

• A. Frederick William, Elector of Brandenburg
  Frederick William, Elector of Brandenburg, was a 17th-century ruler known as the "Great Elector" for transforming Brandenburg-Prussia into a centralized, militarily powerful state and laying the foundations for future Prussian greatness.
• B. Frederick William II of Prussia
  Frederick William II of Prussia was King of Prussia from 1786 to 1797, known for his less militaristic rule than his predecessor Frederick the Great and for overseeing both territorial gains and growing internal weaknesses in the Prussian state.
• C. Frederick William I of Prussia
  Frederick William I of Prussia was the early 18th-century "Soldier King" who transformed Prussia into a highly militarized and efficiently administered state, laying the groundwork for its rise as a major European power.
• D. Frederick II of Prussia
  Frederick II of Prussia, also known as Frederick the Great, was an 18th-century Prussian king renowned for his military genius, enlightened absolutist rule, and transformation of Prussia into a major European power.
• E. Frederick I of Prussia
  Frederick I of Prussia was the first King in Prussia, known for elevating the Duchy of Prussia to a kingdom and promoting culture, science, and absolutist rule in the early 18th century.
• F. None of above. chosen