NAME_1 has a Box. In this box he places in a folder. Before he placed one single sheet of paper in this folder. Now he leaves his room. NAME_2 is later coming in the room. He opens the box, opens the folder and takes the sheet of paper. Now he put’s only the sheet of paper in the box and takes the folder with him. Now NAME_2 is leaving the room. At the evening, NAME_1 is returning in his room.