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: Lockheed Martin X-24C (proposed) | Statement: [Lockheed Martin X-series, hasPart, Lockheed Martin X-24C (proposed)]

Target entity: Lockheed Martin X-24C (proposed)
Context triple: [Lockheed Martin X-series, hasPart, Lockheed Martin X-24C (proposed)]

• A. Lockheed Martin X-27 (concept)
  The Lockheed Martin X-27 was a conceptual U.S. experimental aircraft design study, reportedly exploring high-performance fighter or interceptor capabilities that never progressed to a flying prototype.
• B. Rockwell X-24C concept
  The Rockwell X-24C concept was a proposed hypersonic research aircraft in NASA’s X-plane program, intended to explore advanced high-speed flight and reentry technologies.
• C. Boeing X-40A
  The Boeing X-40A is an unmanned, subscale technology demonstrator that validated key autonomous landing and reentry technologies later used in the U.S. Air Force’s X-37 spaceplane program.
• D. Northrop X-21
  The Northrop X-21 was an experimental U.S. jet aircraft of the 1960s designed to test laminar-flow control technology for improved aerodynamic efficiency.
• E. Martin Marietta X-24A
  The Martin Marietta X-24A was an experimental lifting-body research aircraft developed in the late 1960s to study unpowered reentry and landing characteristics for future reusable spacecraft.
• 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: Lockheed Martin X-24C (proposed)
Triple: [Lockheed Martin X-series, hasPart, Lockheed Martin X-24C (proposed)]

The Lockheed Martin X-24C (proposed) was a conceptual hypersonic research aircraft design intended to explore advanced high-speed flight technologies as part of the experimental X-plane program.

Target entity: Lockheed Martin X-24C (proposed)
Target entity description: The Lockheed Martin X-24C (proposed) was a conceptual hypersonic research aircraft design intended to explore advanced high-speed flight technologies as part of the experimental X-plane program.

• A. Lockheed Martin X-27 (concept)
  The Lockheed Martin X-27 was a conceptual U.S. experimental aircraft design study, reportedly exploring high-performance fighter or interceptor capabilities that never progressed to a flying prototype.
• B. Rockwell X-24C concept chosen
  The Rockwell X-24C concept was a proposed hypersonic research aircraft in NASA’s X-plane program, intended to explore advanced high-speed flight and reentry technologies.
• C. Boeing X-40A
  The Boeing X-40A is an unmanned, subscale technology demonstrator that validated key autonomous landing and reentry technologies later used in the U.S. Air Force’s X-37 spaceplane program.
• D. Northrop X-21
  The Northrop X-21 was an experimental U.S. jet aircraft of the 1960s designed to test laminar-flow control technology for improved aerodynamic efficiency.
• E. Martin Marietta X-24A
  The Martin Marietta X-24A was an experimental lifting-body research aircraft developed in the late 1960s to study unpowered reentry and landing characteristics for future reusable spacecraft.
• F. None of above.