Record 4fb7665da3684232b2ea1790e2f7e224

At 8:00, David carried the dusty folder to the atrium. At 8:00, Ivo noticed this from across the room. At 8:01, David took the dusty folder and placed it in the north stairwell. At 8:01, Ivo noticed this from across the room. At 8:02, David moved the dusty folder into the front office. At 8:02, Ivo happened to be watching. At 8:03, Tamsin took the dusty folder and placed it in the reception area. At 8:03, he happened to be watching. At 8:04, he moved the dusty folder into the basement. At 8:05, David carried the dusty folder to the lobby. At 8:05, Ivo noticed this from across the room. At 8:06, David moved the dusty folder into the front office. At 8:06, Ivo was nearby and saw this happen. At 8:07, he moved the dusty folder into the south stairwell. At 8:08, David moved the dusty folder into the kitchen. At 8:08, Ivo noticed this from across the room. At 8:09, Tamsin brought the bright folder over to the basement. At 8:10, he took the bright folder and placed it in the photo studio. At 8:11, she moved the bright folder into the reception area. At 8:12, David carried the bright folder to the south stairwell. At 8:13, Ivo carried the bright folder to the conference room. At 8:14, Tamsin took the bright folder and placed it in the lobby. At 8:15, David moved the bright folder into the basement. At 8:16, Ivo took the bright folder and placed it in the photo studio. At 8:17, he took the bright folder and placed it in the atrium. At 8:18, Tamsin took the bright folder and placed it in the lobby. At 8:19, she took the bright folder and placed it in the observation deck. At 8:20, she reorganized some papers on the desk. At 8:21, Ivo refilled a cup of coffee. At 8:22, he checked their email.

Where does Ivo believe the dusty folder is? Answer with only the location name (or 'unknown' if they have no belief).

kitchen

(no reasoning captured)