YOU SAID:
once upon a time there was a princess who was the daughter of mighty king
INTO JAPANESE
昔々、強大な王様の娘であるお姫様がいました
BACK INTO ENGLISH
Once upon a time there was a princess who was the daughter of a mighty king
INTO JAPANESE
昔々、強大な王の娘である王女がいました
BACK INTO ENGLISH
Once upon a time there was a princess who was the daughter of a mighty king
You've done this before, haven't you.