#age.era  a historic period; "we live in a litigious age"
  instance:  Elizabethan_age  Victorian_age
  supertype:  era  a period marked by distinctive character or reckoned from a fixed point or event
     supertype:  time_period__period__period_of_time  an amount of time; "a time period of 30 years"; "hastened the period of his recovery"
        supertype:  time_measure__temporal_attribute_or_quality_or_measure  temporal duration or positions of time_points and time_intervals along the universal timeline
           supertype:  attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s
              supertype:  non_spatial_object__nonspatialobject  abstraction or description content/medium/container (a description medium that has some spatial feature is both instance of sumo#object and pm#non_spatial_object
                 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:  intangible  The collection of things that are not physical -- are not made of, or encoded in, matter. Every cyc#Collection is a cyc#intangible (even if its instances are tangible), and so are some cyc#individuals.  Caution: do not confuse `tangibility' with `perceivability' -- humans can perceive light even though it's intangible--at least in a sense.
                    supertype:  partially_intangible__partiallyintangible  The collection of things that either are wholly intangible (see cyc#Intangible) or have at least one intangible (i.e. immaterial) part (see cyc#intangibleParts). This includes intangible individuals, such as instances of cyc#Number-General  or cyc#Agreement, as well as non-individuals (all of which are intangible), i.e. instances of cyc#SetOrCollection.  It also includes things that have both tangible and intangible components (see cyc#CompositeTangibleAndIntangibleObject),  such as a printed copy of a newspaper (as its information content is intangible) or a person (as her mental states are intangible).
                       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:  thing_that_can_be_seen_as_a_relation  usable as relation type
                 supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                    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:  individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
                 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:  fundamental_quantity__fundamentalquantity__fundamental_measure__fundamentalmeasure  one of the four quantities that are the basis of systems of measurement
           supertype:  measure__quantity__amount__quantum  how much there is of something that you can measure
              supertype:  attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s

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