code: def save(self, *args, **kwargs):
          
          if self.date_of_death != None:
              self.is_deceased = True
              
          # Since we often copy and paste names from strange sources, do some basic cleanup
          self.first_name = self.first_name.strip()
          self.last_name = self.last_name.strip()
          self.other_names = self.other_names.strip()
          
          # Call save method
          super(Person, self).save(*args, **kwargs)
docs: If date of death is specified, set is_deceased to true