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: Causantín mac Fergusa | Statement: [Picts (early period), notableRuler, Causantín mac Fergusa]

Target entity: Causantín mac Fergusa
Context triple: [Picts (early period), notableRuler, Causantín mac Fergusa]

• A. Áed Find
  Áed Find was a king of Dál Riata in the 8th century, remembered in later tradition as an important ancestor of the Scottish royal line.
• B. Ailpín mac Echdach
  Ailpín mac Echdach was a 9th-century Scottish noble traditionally regarded as the father of Kenneth MacAlpin, the first king to unite the Picts and Scots.
• C. Domnall mac Ailpín
  Domnall mac Ailpín was a 9th-century king of the Picts (often regarded as an early king of Scotland) and a member of the Alpin dynasty who ruled after Kenneth MacAlpin.
• D. Eóganán mac Óengusa
  Eóganán mac Óengusa was a 9th-century king of the Picts who ruled in what is now Scotland shortly before the rise of Kenneth MacAlpin and the formation of the Kingdom of Alba.
• E. Bridei mac Bili
  Bridei mac Bili was a powerful 7th-century king of the Picts, best known for his military successes against the Northumbrians and for consolidating Pictish power in northern Britain.
• 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: Causantín mac Fergusa
Triple: [Picts (early period), notableRuler, Causantín mac Fergusa]

Causantín mac Fergusa was an early 9th-century king of the Picts whose reign marked a significant stage in the formation of the medieval kingdom that would become Scotland.

Target entity: Causantín mac Fergusa
Target entity description: Causantín mac Fergusa was an early 9th-century king of the Picts whose reign marked a significant stage in the formation of the medieval kingdom that would become Scotland.

• A. Áed Find
  Áed Find was a king of Dál Riata in the 8th century, remembered in later tradition as an important ancestor of the Scottish royal line.
• B. Ailpín mac Echdach
  Ailpín mac Echdach was a 9th-century Scottish noble traditionally regarded as the father of Kenneth MacAlpin, the first king to unite the Picts and Scots.
• C. Domnall mac Ailpín
  Domnall mac Ailpín was a 9th-century king of the Picts (often regarded as an early king of Scotland) and a member of the Alpin dynasty who ruled after Kenneth MacAlpin.
• D. Eóganán mac Óengusa
  Eóganán mac Óengusa was a 9th-century king of the Picts who ruled in what is now Scotland shortly before the rise of Kenneth MacAlpin and the formation of the Kingdom of Alba.
• E. Bridei mac Bili
  Bridei mac Bili was a powerful 7th-century king of the Picts, best known for his military successes against the Northumbrians and for consolidating Pictish power in northern Britain.
• F. None of above. chosen