#Mercury_program  a program of rocket-powered flights undertaken by US between 1961 and 1963 with the goal of putting a man in orbit around the earth; "under the Mercury program each flight had one astronaut"
  supertype:  space_program__spaceprogram  a technological program intended to explore outer space
     supertype:  program__programme  a system of projects or services intended to meet a public need; "he proposed an elaborate program of public works"; "working mothers rely on the day care program"
        supertype:  system_of_rules__system  a complex of methods or rules governing behavior; "they have to operate under a system they oppose"; "that language has a complex system for indicating gender"
           supertype:  system  a group of independent but interrelated elements comprising a unified whole; "a vast system of production and distribution and consumption keep the country going"
              supertype:  group__grouping  any number of entities (members) considered as a unit
                 supertype:  collection  something gathering separated things (entities/situations)
                    supertype:  divisible_entity__divisibleentity  many classifications under this category are application-dependant
                       supertype:  entity  something that can be "involved" in a situation
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  divisible_thing__divisiblething
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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