Rasa get sub intent

image image Im doing bot for school and I need to use custom action to get sub intent of FAQ and get the response from database, but I cant get sub intent.

Im using latest rasa version and I found code on git that might help but it doesnt work

full_intent = (
            tracker.latest_message.get("response_selector", {})
            .get("faq", {})
        if full_intent:
            topic = full_intent.split("/")[1]
            topic = None