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: Medium Explorer (MIDEX) missions | Statement: [NASA Explorer program (beyond-Explorer class), relatedTo, Medium Explorer (MIDEX) missions]

Target entity: Medium Explorer (MIDEX) missions
Context triple: [NASA Explorer program (beyond-Explorer class), relatedTo, Medium Explorer (MIDEX) missions]

• A. MDA Space Missions
  MDA Space Missions is a Canadian aerospace company division specializing in the design and operation of space robotics, satellites, and related mission systems.
• B. DSX (Demonstration and Science Experiments) spacecraft
  The DSX (Demonstration and Science Experiments) spacecraft is a U.S. Air Force Research Laboratory mission designed to study the effects of the space environment on spacecraft components and technologies in medium Earth orbit.
• C. Small Explorer missions
  Small Explorer missions are a series of relatively low-cost, focused NASA space science missions designed to conduct targeted astrophysics, heliophysics, and planetary research.
• D. NASA SIMPLEx missions
  NASA SIMPLEx missions are low-cost, competitively selected planetary science missions that use small spacecraft to conduct focused, high-value investigations within the Solar System.
• E. Mariner planetary missions
  The Mariner planetary missions were a series of NASA robotic space probes launched in the 1960s and 1970s to conduct the first detailed flybys and studies of Venus, Mars, and Mercury.
• 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: Medium Explorer (MIDEX) missions
Triple: [NASA Explorer program (beyond-Explorer class), relatedTo, Medium Explorer (MIDEX) missions]

Medium Explorer (MIDEX) missions are a class of NASA space science missions within the Explorer program that conduct focused, competitively selected astrophysics, heliophysics, and Earth science investigations under moderate cost and complexity constraints.

Target entity: Medium Explorer (MIDEX) missions
Target entity description: Medium Explorer (MIDEX) missions are a class of NASA space science missions within the Explorer program that conduct focused, competitively selected astrophysics, heliophysics, and Earth science investigations under moderate cost and complexity constraints.

• A. MDA Space Missions
  MDA Space Missions is a Canadian aerospace company division specializing in the design and operation of space robotics, satellites, and related mission systems.
• B. DSX (Demonstration and Science Experiments) spacecraft
  The DSX (Demonstration and Science Experiments) spacecraft is a U.S. Air Force Research Laboratory mission designed to study the effects of the space environment on spacecraft components and technologies in medium Earth orbit.
• C. Small Explorer missions
  Small Explorer missions are a series of relatively low-cost, focused NASA space science missions designed to conduct targeted astrophysics, heliophysics, and planetary research.
• D. NASA SIMPLEx missions
  NASA SIMPLEx missions are low-cost, competitively selected planetary science missions that use small spacecraft to conduct focused, high-value investigations within the Solar System.
• E. Mariner planetary missions
  The Mariner planetary missions were a series of NASA robotic space probes launched in the 1960s and 1970s to conduct the first detailed flybys and studies of Venus, Mars, and Mercury.
• F. None of above. chosen