old_contents: from django.contrib import admin
  
  from .models import Talk
  
  
  @admin.register(Talk)
  class TalkAdmin(admin.ModelAdmin):
      pass
  
new_contents: from django.contrib import admin
  
  from .models import Talk
  
  
  @admin.register(Talk)
  class TalkAdmin(admin.ModelAdmin):
      list_display = ('conference', 'title', 'topic', 'language',)
      list_filter = ('conference',)
      search_fields = ('title', 'abstract',)
  
subject: Improve talk admin