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: Nightfall | Statement: [House Greyjoy, ancestralWeapon, Nightfall]

Target entity: Nightfall
Context triple: [House Greyjoy, ancestralWeapon, Nightfall]

• A. Nightfall
  "Nightfall" is a classic science fiction short story by Isaac Asimov that explores the psychological and societal collapse of a civilization experiencing darkness and a view of the stars for the first time.
• B. Nightfall
  Nightfall is a studio album by American country music group Little Big Town, noted for its lush harmonies and reflective, atmospheric songwriting.
• C. Lest Darkness Fall
  Lest Darkness Fall is a classic alternate history science fiction novel by L. Sprague de Camp in which a modern archaeologist is transported to the late Roman Empire and attempts to prevent the onset of the Dark Ages.
• D. By Nightfall
  By Nightfall is a contemporary novel by Michael Cunningham that explores themes of desire, art, and midlife crisis through the story of a New York art dealer whose life is unsettled by the arrival of his wife's younger brother.
• E. Night Must Fall
  Night Must Fall is a 1937 psychological thriller film, adapted from Emlyn Williams' play, in which Robert Montgomery delivers a chilling performance as a charming yet sinister murderer.
• 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: Nightfall
Triple: [House Greyjoy, ancestralWeapon, Nightfall]

Nightfall is a Valyrian steel longsword of House Harlaw, carried by the fearsome Ironborn raider Ser Harras Harlaw in the world of A Song of Ice and Fire.

Target entity: Nightfall
Target entity description: Nightfall is a Valyrian steel longsword of House Harlaw, carried by the fearsome Ironborn raider Ser Harras Harlaw in the world of A Song of Ice and Fire.

• A. Nightfall
  "Nightfall" is a classic science fiction short story by Isaac Asimov that explores the psychological and societal collapse of a civilization experiencing darkness and a view of the stars for the first time.
• B. Nightfall
  Nightfall is a studio album by American country music group Little Big Town, noted for its lush harmonies and reflective, atmospheric songwriting.
• C. Lest Darkness Fall
  Lest Darkness Fall is a classic alternate history science fiction novel by L. Sprague de Camp in which a modern archaeologist is transported to the late Roman Empire and attempts to prevent the onset of the Dark Ages.
• D. By Nightfall
  By Nightfall is a contemporary novel by Michael Cunningham that explores themes of desire, art, and midlife crisis through the story of a New York art dealer whose life is unsettled by the arrival of his wife's younger brother.
• E. Night Must Fall
  Night Must Fall is a 1937 psychological thriller film, adapted from Emlyn Williams' play, in which Robert Montgomery delivers a chilling performance as a charming yet sinister murderer.
• F. None of above. chosen