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: Explorer 71 | Statement: [ACE spacecraft, explorerDesignation, Explorer 71]

Target entity: Explorer 71
Context triple: [ACE spacecraft, explorerDesignation, Explorer 71]

• A. Explorer 3 mission
  The Explorer 3 mission was an early U.S. satellite flight in 1958 that helped confirm the existence of the Van Allen radiation belts through its onboard scientific instruments.
• B. Ranger spacecraft
  The Ranger spacecraft is a fictional advanced space vehicle featured in the film "Interstellar," used for planetary exploration and piloted by astronaut Joseph Cooper.
• C. Magellan spacecraft
  The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
• D. Ulysses spacecraft
  The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
• E. Pioneer 7
  Pioneer 7 was a NASA space probe launched in 1966 as part of the Pioneer program to study the solar wind, interplanetary magnetic fields, and cosmic rays in deep space.
• 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: Explorer 71
Triple: [ACE spacecraft, explorerDesignation, Explorer 71]

Explorer 71 is a NASA Explorer-series scientific satellite better known as the Advanced Composition Explorer (ACE), designed to study energetic particles from the Sun, the interplanetary medium, and galactic sources.

Target entity: Explorer 71
Target entity description: Explorer 71 is a NASA Explorer-series scientific satellite better known as the Advanced Composition Explorer (ACE), designed to study energetic particles from the Sun, the interplanetary medium, and galactic sources.

• A. Explorer 3 mission
  The Explorer 3 mission was an early U.S. satellite flight in 1958 that helped confirm the existence of the Van Allen radiation belts through its onboard scientific instruments.
• B. Ranger spacecraft
  The Ranger spacecraft is a fictional advanced space vehicle featured in the film "Interstellar," used for planetary exploration and piloted by astronaut Joseph Cooper.
• C. Magellan spacecraft
  The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
• D. Ulysses spacecraft
  The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
• E. Pioneer 7
  Pioneer 7 was a NASA space probe launched in 1966 as part of the Pioneer program to study the solar wind, interplanetary magnetic fields, and cosmic rays in deep space.
• F. None of above. chosen

Target predicate: explorerDesignation
Context triple: [ACE spacecraft, explorerDesignation, Explorer 71]

• A. explorer
  Indicates that an entity engages in the activity of exploring or investigating places, ideas, or domains.
• B. orbiterDesignation
  Indicates that one entity is designated as an orbiter (spacecraft or object in orbit) associated with another entity.
• C. roverName
  Indicates that an entity is the name assigned to a particular rover.
• D. hasSpacecraftNamedAfter
  Indicates that one entity has a spacecraft that is named after another entity.
• E. explorerEditionReleaseDate
  Indicates the date on which an explorer edition of a product or software is officially released.
• F. None of above. chosen