A man in glasses writes the message "Who are you?" on a notepad.
A guy writes on a piece of paper, while in an office.
Writing a message does not imply being in an office.
exists e1 p1 x1 x2 x3 x4 x5.(n_person(x3) & n_message(x3) & Theme(e1,x3) & Actor(e1,x1) & v_write(e1) & on(p1,x5) & n_notepad(x5) & (x4 = x3) & (x3 = x4) & in(x1,x2) & n_glass(x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(in(e1,x4) & n_office(x4) & r_while(e1) & on(e1,x2) & of(x2,x3) & n_paper(x3) & n_piece(x2) & Actor(e1,x1) & v_write(e1) & n_guy(x1))