Yes, this is the same hand I just posted in another thread, but this a different auction/problem.
South's 3NT bid is described as: 3+C; 5-H; 5-S; 19-21HCP; 22-total points; likely stop in D.
Isn't that basically a hand that would have opened 2N (except possibly for the 19HCP part)?
The step-by-step convention card for BBO Advanced 1.3 says that uncontested 1m-1M-3N shows opener has running m with short M. I think this auction should show the same hand. (Apparently the human playing the hand thought so too.)

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