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: Mitsubishi Ki-21 | Statement: [Imperial Japanese Army Air Service, usedAircraft, Mitsubishi Ki-21]

Target entity: Mitsubishi Ki-21
Context triple: [Imperial Japanese Army Air Service, usedAircraft, Mitsubishi Ki-21]

• A. Nakajima Ki-27
  The Nakajima Ki-27 was a Japanese single-engine, fixed-gear fighter aircraft that served as the Imperial Japanese Army’s main frontline fighter in the late 1930s and early World War II.
• B. Nakajima Ki-44
  The Nakajima Ki-44 was a fast, heavily armed Japanese single-seat fighter aircraft of World War II, notable for its emphasis on climb rate and interception over maneuverability.
• C. Nakajima Ki-43
  The Nakajima Ki-43 was a highly maneuverable Japanese single-engine fighter aircraft of World War II, widely used in the early and mid-war years across multiple Asian and Pacific battlefronts.
• D. Nakajima Ki-84
  The Nakajima Ki-84 was a late-World War II Japanese single-seat fighter aircraft renowned for its high speed, powerful armament, and effectiveness against Allied fighters and bombers.
• E. Aichi D3A dive bombers
  The Aichi D3A was a Japanese carrier-based dive bomber used extensively by the Imperial Japanese Navy during World War II, notably in the attack on Pearl Harbor.
• 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: Mitsubishi Ki-21
Triple: [Imperial Japanese Army Air Service, usedAircraft, Mitsubishi Ki-21]

The Mitsubishi Ki-21 was a twin-engine Japanese heavy bomber used extensively by the Imperial Japanese Army during the early years of World War II.

Target entity: Mitsubishi Ki-21
Target entity description: The Mitsubishi Ki-21 was a twin-engine Japanese heavy bomber used extensively by the Imperial Japanese Army during the early years of World War II.

• A. Nakajima Ki-27
  The Nakajima Ki-27 was a Japanese single-engine, fixed-gear fighter aircraft that served as the Imperial Japanese Army’s main frontline fighter in the late 1930s and early World War II.
• B. Nakajima Ki-44
  The Nakajima Ki-44 was a fast, heavily armed Japanese single-seat fighter aircraft of World War II, notable for its emphasis on climb rate and interception over maneuverability.
• C. Nakajima Ki-43
  The Nakajima Ki-43 was a highly maneuverable Japanese single-engine fighter aircraft of World War II, widely used in the early and mid-war years across multiple Asian and Pacific battlefronts.
• D. Nakajima Ki-84
  The Nakajima Ki-84 was a late-World War II Japanese single-seat fighter aircraft renowned for its high speed, powerful armament, and effectiveness against Allied fighters and bombers.
• E. Aichi D3A dive bombers
  The Aichi D3A was a Japanese carrier-based dive bomber used extensively by the Imperial Japanese Navy during World War II, notably in the attack on Pearl Harbor.
• F. None of above. chosen