code: def run(self, dispatcher, tracker, domain):
      concerts = tracker.get_slot("concerts")
      dispatcher.utter_message(text=f"concerts from slots: {concerts}")
      return []
  
imports: from rasa_sdk import Action
  from rasa_sdk.events import SlotSet
label_desc: Use image node_id 2 for calling the ActionShowConcertReviews obj's underlying member method code with example usage: obj.run(dispatcher, tracker, domain) and returns: list