code: def add_entity(self, name, lines, reload_cache=False):
          
          Entity.verify_name(name)
          self.entities.add(Entity.wrap_name(name), lines, reload_cache)
          self.padaos.add_entity(name, lines)
          self.must_train = True
docs: Adds an entity that matches the given lines.
  
          Example:
              self.add_intent('weather', ['will it rain on {weekday}?'])
              self.add_entity('{weekday}', ['monday', 'tuesday', 'wednesday'])  # ...
  
          Args:
              name (str): The name of the entity
              lines (list<str>): Lines of example extracted entities
              reload_cache (bool): Whether to refresh all of cache