A young man is looking at photos on his computer, sitting at a desk.
The young man is looking at a blank computer screen.
The screen would not be blank if the man is looking at photos that are on the computer.
exists e2 e1 s1 x1 x2 x3 x4 x5.(at(e1,x2) & on(x2,x3) & at(e2,x5) & n_desk(x5) & Actor(e2,x4) & v_sit(e2) & (x3 = x4) & n_computer(x3) & of(x3,x1) & n_male(x1) & n_photo(x2) & Actor(e1,x1) & v_look(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(n_man(x1) & a_young(s1) & Theme(s1,x1) & at(e1,x2) & n_screen(x2) & of(x2,x3) & n_computer(x3) & a_blank(s2) & Theme(s2,x2) & Actor(e1,x1) & v_look(e1))