A woman in a brown shirt looking down.
Nobody is looking
Since a woman is looking down, it would be untrue to say that nobody is looking.
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & a_down(s2) & Manner(e1,s2) & Actor(e1,x3) & v_look(e1) & (x1 = x3) & in(x1,x2) & n_shirt(x2) & a_brown(s1) & Theme(s1,x2) & n_woman(x1))
-exists e1 x1.(Actor(e1,x1) & v_look(e1) & n_person(x1))