#foundation  the basis on which something is grounded; "there is little foundation for his objections"
  supertype:  #relation  an abstraction belonging to or characteristic of two entities or parts together
  subtype:  #basis__basi__footing  a relation that provides the foundation for something; "they were on a friendly footing" or "he worked on an interim basis"
     subtype:  #common_ground  a basis agreed to by all parties for reaching a mutual understanding
  subtype:  #grass_roots.foundation__grassroot  the essential foundation or source; "the problem was attacked at the grass roots"

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