role based entity extraction rasa code example

Example 1: rasa entity extraction

Give me a [small]{"entity": "size", "group": "1"} pizza with [mushrooms]{"entity": "topping", "group": "1"} and
a [large]{"entity": "size", "group": "2"} [pepperoni]{"entity": "topping", "group": "2"}

Example 2: rasa entity extraction

{
  "text": "Book a flight from Berlin to SF",
  "intent": "book_flight",
  "entities": [
    {
      "start": 19,
      "end": 25,
      "value": "Berlin",
      "entity": "city",
      "role": "departure",
      "extractor": "DIETClassifier",
    },
    {
      "start": 29,
      "end": 31,
      "value": "San Francisco",
      "entity": "city",
      "role": "destination",
      "extractor": "DIETClassifier",
    }
  ]
}