RDF is intended to provide a simple way to state properties of
    (facts about) resources
    http://www.example.org/index.html has
    a creator whose value is John Smith
    
      - We need a way to identify the thing we want to describe (the
      Web page, in this case)
- We need a way to identify a specific property (the creator)
      of the thing that we want to describe
- We need a way to identify the thing we want to assign as the
      value of this property (who the creator is), for the thing we
      want to describe