System entities are a built-in part of the Core package. If there’s a corresponding entity on the Amazon or Dialogflow platforms, we map it to our entity, otherwise, we generate the custom entity of the same name on the platform.

System	Amazon	Dialogflow
number	AMAZON.NUMBER	@sys.number-integer
city	AMAZON.City	@sys.geo-city
country	AMAZON.Country	@sys.geo-country
any	AMAZON.SearchQuery	@sys.any
person	AMAZON.FirstName	@sys.person
artist	AMAZON.Artist	@sys.music-artist
genre	AMAZON.Genre	@sys.music-genre
song-name	AMAZON.MusicRecording	@sys.any