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: Launch Complex 21 | Statement: [Cape Canaveral launch complexes, hasPart, Launch Complex 21]

Target entity: Launch Complex 21
Context triple: [Cape Canaveral launch complexes, hasPart, Launch Complex 21]

• A. Launch Complex 19
  Launch Complex 19 is a historic launch pad at Cape Canaveral used primarily for NASA’s Project Gemini crewed spaceflights in the 1960s.
• B. Launch Complex 17
  Launch Complex 17 is a historic Cape Canaveral launch site best known for supporting numerous Delta rocket missions for NASA and the U.S. Air Force.
• C. Launch Complex 12
  Launch Complex 12 is a historic rocket launch site at Cape Canaveral in Florida that was used primarily for early U.S. military and space launch operations.
• D. Launch Complex 2
  Launch Complex 2 is one of the early rocket launch pads at Cape Canaveral, historically used for testing and launching smaller missiles and sounding rockets during the early years of the U.S. space program.
• E. Launch Complex 17B
  Launch Complex 17B is a launch pad at Cape Canaveral Air Force Station in Florida that was used primarily for Delta rocket launches for NASA and commercial satellites.
• 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: Launch Complex 21
Triple: [Cape Canaveral launch complexes, hasPart, Launch Complex 21]

Launch Complex 21 is a former U.S. military rocket launch facility at Cape Canaveral, Florida, used primarily during the early years of the American space and missile programs.

Target entity: Launch Complex 21
Target entity description: Launch Complex 21 is a former U.S. military rocket launch facility at Cape Canaveral, Florida, used primarily during the early years of the American space and missile programs.

• A. Launch Complex 19
  Launch Complex 19 is a historic launch pad at Cape Canaveral used primarily for NASA’s Project Gemini crewed spaceflights in the 1960s.
• B. Launch Complex 17
  Launch Complex 17 is a historic Cape Canaveral launch site best known for supporting numerous Delta rocket missions for NASA and the U.S. Air Force.
• C. Launch Complex 12
  Launch Complex 12 is a historic rocket launch site at Cape Canaveral in Florida that was used primarily for early U.S. military and space launch operations.
• D. Launch Complex 2
  Launch Complex 2 is one of the early rocket launch pads at Cape Canaveral, historically used for testing and launching smaller missiles and sounding rockets during the early years of the U.S. space program.
• E. Launch Complex 17B
  Launch Complex 17B is a launch pad at Cape Canaveral Air Force Station in Florida that was used primarily for Delta rocket launches for NASA and commercial satellites.
• F. None of above. chosen