Conversation so far:
who is getting promoted to the premier league
The promoted teams for the 28th season of the Premier League are Norwich City, Sheffield United and Aston Villa.
how long were norwich city, sheffield united and aston villa absent from the premier league
Norwich City and Aston Villa return to the top flight after absences of three years from the Premier League, while Sheffield United return after a twelve year absence.

Question: who did the teams replace
Self-contained rewrite: who did norwich city, sheffield united and aston villa replace in the 2019-20 premier league