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: Rex Britanniae | Statement: [Æthelbald of Mercia, title, Rex Britanniae]

Target entity: Rex Britanniae
Context triple: [Æthelbald of Mercia, title, Rex Britanniae]

• A. Britannia Secunda
  Britannia Secunda was a late Roman province in Britain, created during the administrative reorganization of Roman Britain and generally thought to have encompassed parts of what is now northern England and possibly Wales.
• B. Britannia Inferior
  Britannia Inferior was a northern Roman province in Britain, centered on Eboracum (modern York), created when the original province of Britannia was split for administrative and military control.
• C. Brut y Brenhinedd
  Brut y Brenhinedd is a Middle Welsh prose chronicle that adapts and translates Geoffrey of Monmouth’s Latin Historia Regum Britanniae, recounting the legendary history of the kings of Britain.
• D. Britannia Superior
  Britannia Superior was a Roman province in southern Britain that included the important city of Londinium (London) as a major administrative and commercial center.
• E. Britannia Prima
  Britannia Prima was a late Roman province carved out of Roman Britain during the empire’s administrative reorganization in the 3rd–4th centuries CE.
• 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: Rex Britanniae
Triple: [Æthelbald of Mercia, title, Rex Britanniae]

Rex Britanniae is a Latin royal style meaning "King of Britain," used to assert overlordship or supremacy over the whole island beyond a ruler’s own kingdom.

Target entity: Rex Britanniae
Target entity description: Rex Britanniae is a Latin royal style meaning "King of Britain," used to assert overlordship or supremacy over the whole island beyond a ruler’s own kingdom.

• A. Britannia Secunda
  Britannia Secunda was a late Roman province in Britain, created during the administrative reorganization of Roman Britain and generally thought to have encompassed parts of what is now northern England and possibly Wales.
• B. Britannia Inferior
  Britannia Inferior was a northern Roman province in Britain, centered on Eboracum (modern York), created when the original province of Britannia was split for administrative and military control.
• C. Brut y Brenhinedd
  Brut y Brenhinedd is a Middle Welsh prose chronicle that adapts and translates Geoffrey of Monmouth’s Latin Historia Regum Britanniae, recounting the legendary history of the kings of Britain.
• D. Britannia Superior
  Britannia Superior was a Roman province in southern Britain that included the important city of Londinium (London) as a major administrative and commercial center.
• E. Britannia Prima
  Britannia Prima was a late Roman province carved out of Roman Britain during the empire’s administrative reorganization in the 3rd–4th centuries CE.
• F. None of above. chosen