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: Frank Gruber | Statement: [The Mask of Dimitrios, screenwriter, Frank Gruber]

Target entity: Frank Gruber
Context triple: [The Mask of Dimitrios, screenwriter, Frank Gruber]

• A. Frank Kurtz
  Frank Kurtz was a highly decorated American World War II bomber pilot and later an aviation executive, best known as the father of actress Swoosie Kurtz.
• B. Paul Brenner
  Paul Brenner is an undercover U.S. Army Criminal Investigation Division agent who serves as the central protagonist in Nelson DeMille’s military crime thriller "The General’s Daughter."
• C. Buford "Mad Dog" Tannen
  Buford "Mad Dog" Tannen is the ruthless, hot-tempered outlaw and ancestor of Biff Tannen who serves as the main antagonist in the Old West setting of Back to the Future Part III.
• D. Kurt Weiss
  Kurt Weiss is an individual notable enough to be recognized as a namesake of the surname Weiss, though specific widely known biographical details are not clearly established.
• E. Hans Klopek
  Hans Klopek is a mysterious and unsettling neighbor in the dark comedy film "The 'Burbs," suspected by the protagonists of hiding sinister secrets.
• 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: Frank Gruber
Triple: [The Mask of Dimitrios, screenwriter, Frank Gruber]

Frank Gruber was an American writer best known for his prolific work in pulp fiction, mystery and Western novels, and Hollywood screenplays.

Target entity: Frank Gruber
Target entity description: Frank Gruber was an American writer best known for his prolific work in pulp fiction, mystery and Western novels, and Hollywood screenplays.

• A. Frank Kurtz
  Frank Kurtz was a highly decorated American World War II bomber pilot and later an aviation executive, best known as the father of actress Swoosie Kurtz.
• B. Paul Brenner
  Paul Brenner is an undercover U.S. Army Criminal Investigation Division agent who serves as the central protagonist in Nelson DeMille’s military crime thriller "The General’s Daughter."
• C. Buford "Mad Dog" Tannen
  Buford "Mad Dog" Tannen is the ruthless, hot-tempered outlaw and ancestor of Biff Tannen who serves as the main antagonist in the Old West setting of Back to the Future Part III.
• D. Kurt Weiss
  Kurt Weiss is an individual notable enough to be recognized as a namesake of the surname Weiss, though specific widely known biographical details are not clearly established.
• E. Hans Klopek
  Hans Klopek is a mysterious and unsettling neighbor in the dark comedy film "The 'Burbs," suspected by the protagonists of hiding sinister secrets.
• F. None of above. chosen