new_contents: from django.contrib import admin
  from .models import Institution, System
  
  
  class InstitutionAdmin(admin.ModelAdmin):
      list_display = ('name', 'ipeds_id', 'ope_id')
      list_filter = ('institution_type',)
      list_editable = ('ipeds_id', 'ope_id')
  
  admin.site.register(Institution, InstitutionAdmin)
  admin.site.register(System, admin.ModelAdmin)
  
subject: add models to admin