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: GRAIL | Statement: [NASA Discovery Program, mission, GRAIL]

Target entity: GRAIL
Context triple: [NASA Discovery Program, mission, GRAIL]

• A. Lunar Reconnaissance Orbiter
  Lunar Reconnaissance Orbiter is a NASA robotic spacecraft launched in 2009 to map the Moon’s surface in high detail and search for resources such as water ice.
• B. Luna spacecraft
  The Luna spacecraft were a series of Soviet robotic probes launched between the late 1950s and 1970s that achieved many lunar exploration firsts, including the first human-made object to reach the Moon and the first soft landing on its surface.
• C. Moon Ra
  Moon Ra is a fictional character or element from Jon Anderson’s progressive rock concept album "Olias of Sunhillow," contributing to its mythic, science-fantasy narrative world.
• D. Dawn mission
  The Dawn mission was a NASA space probe that studied the two largest bodies in the asteroid belt, Vesta and Ceres, to investigate the conditions and processes of the early solar system.
• E. Selenological and Engineering Explorer
  Selenological and Engineering Explorer, also known as Kaguya (SELENE), was a Japanese lunar orbiter mission launched by JAXA to study the Moon’s origin, evolution, and surface in unprecedented detail.
• 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: GRAIL
Triple: [NASA Discovery Program, mission, GRAIL]

GRAIL was a NASA lunar mission that used twin spacecraft to map the Moon’s gravitational field in unprecedented detail to study its internal structure and evolution.

Target entity: GRAIL
Target entity description: GRAIL was a NASA lunar mission that used twin spacecraft to map the Moon’s gravitational field in unprecedented detail to study its internal structure and evolution.

• A. Lunar Reconnaissance Orbiter
  Lunar Reconnaissance Orbiter is a NASA robotic spacecraft launched in 2009 to map the Moon’s surface in high detail and search for resources such as water ice.
• B. Luna spacecraft
  The Luna spacecraft were a series of Soviet robotic probes launched between the late 1950s and 1970s that achieved many lunar exploration firsts, including the first human-made object to reach the Moon and the first soft landing on its surface.
• C. Moon Ra
  Moon Ra is a fictional character or element from Jon Anderson’s progressive rock concept album "Olias of Sunhillow," contributing to its mythic, science-fantasy narrative world.
• D. Dawn mission
  The Dawn mission was a NASA space probe that studied the two largest bodies in the asteroid belt, Vesta and Ceres, to investigate the conditions and processes of the early solar system.
• E. Selenological and Engineering Explorer
  Selenological and Engineering Explorer, also known as Kaguya (SELENE), was a Japanese lunar orbiter mission launched by JAXA to study the Moon’s origin, evolution, and surface in unprecedented detail.
• F. None of above. chosen