On that door are the words: 'SI SEDES NON IS' like mentioned by someone else before.
Si SEDES NON IS means: "If you sit, do not go".
So I decided to go to the Days Destroyed game and tried to
SIT: "No time for lounging about now."
So the command is recognized.
Yes, when I tried it some days ago I thought as you that it was something meaningful. Unfortunately, it seems there is a set of commands predefined for this type of text adventures and sit is one of them. If you try to "sleep", the system answers with the same sentence.
Good job with the spreadsheet guys.
Mephala, I'm sorry I ruined your life
