#ferromagnetism  phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed
  supertype:  #magnetism__magnetic_attraction__magnetic_force  attraction for iron; associated with electric currents as well as magnets; characterized by fields of force
     supertype:  #attractive_force__attraction  the force by which one object attracts another
        supertype:  #force  the physical influence that produces a change in a physical quantity; "force equals mass times acceleration"
           supertype:  #physical_phenomenon  a natural phenomenon involving the physics of matter and energy
              supertype:  #natural_phenomenon__naturalphenomenon  all non-artificial phenomena
                 supertype:  #phenomenon  any state or process known through the senses rather than by intuition or reasoning
                    supertype:  sumo#process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                       supertype:  pm#situation  something that "occurs" in a real/imaginary region of time and space
                          supertype:  pm#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:  pm#process_or_process_description
                          supertype:  pm#processing_thing
                             supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                                supertype:  pm#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:  sumo#physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                          supertype:  pm#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

No statement uses or specializes #ferromagnetism; click here to add one.