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: Soyuz 21 | Statement: [Soyuz 19, followedBy, Soyuz 21]

Target entity: Soyuz 21
Context triple: [Soyuz 19, followedBy, Soyuz 21]

• A. Soyuz T-15
  Soyuz T-15 was a Soviet crewed spacecraft mission notable for inaugurating operations on the Mir space station while also visiting the aging Salyut 7 station in a unique dual-docking flight.
• B. Soyuz 18
  Soyuz 18 was a Soviet crewed spacecraft mission in the mid-1970s that experienced a serious launch abort and is often noted for its dramatic emergency reentry and safe recovery of the cosmonauts.
• C. Soyuz 19
  Soyuz 19 was the Soviet spacecraft that participated in the historic 1975 Apollo–Soyuz Test Project, enabling the first international crewed space docking between the USSR and the United States.
• D. Salyut 7
  Salyut 7 was a Soviet-era modular space station that served as one of the last and most advanced stations in the Salyut program, paving the way for the later Mir space station.
• E. Soyuz TM-21
  Soyuz TM-21 was a Russian crewed spacecraft mission notable for carrying U.S. astronaut Norman E. Thagard to the Mir space station as part of early Shuttle-Mir cooperation.
• 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: Soyuz 21
Triple: [Soyuz 19, followedBy, Soyuz 21]

Soyuz 21 was a 1976 Soviet crewed spaceflight that transported cosmonauts to the Salyut 5 space station for a long-duration military-related mission.

Target entity: Soyuz 21
Target entity description: Soyuz 21 was a 1976 Soviet crewed spaceflight that transported cosmonauts to the Salyut 5 space station for a long-duration military-related mission.

• A. Soyuz T-15
  Soyuz T-15 was a Soviet crewed spacecraft mission notable for inaugurating operations on the Mir space station while also visiting the aging Salyut 7 station in a unique dual-docking flight.
• B. Soyuz 18
  Soyuz 18 was a Soviet crewed spacecraft mission in the mid-1970s that experienced a serious launch abort and is often noted for its dramatic emergency reentry and safe recovery of the cosmonauts.
• C. Soyuz 19
  Soyuz 19 was the Soviet spacecraft that participated in the historic 1975 Apollo–Soyuz Test Project, enabling the first international crewed space docking between the USSR and the United States.
• D. Salyut 7
  Salyut 7 was a Soviet-era modular space station that served as one of the last and most advanced stations in the Salyut program, paving the way for the later Mir space station.
• E. Soyuz TM-21
  Soyuz TM-21 was a Russian crewed spacecraft mission notable for carrying U.S. astronaut Norman E. Thagard to the Mir space station as part of early Shuttle-Mir cooperation.
• F. None of above. chosen