Male youths in drab clothing stare at something above them with an Arabic sign in the background.
Nobody is looking at anything.
Male youths cannot be considered as nobody.
exists s1 s2 s3 x1 x2 x3 x4 x5 x6.(n_background(x6) & a_topic(x1) & in(x1,x2) & at(x2,x4) & with(x4,x5) & in(x5,x6) & n_sign(x5) & a_arabic(s3) & Theme(s3,x5) & above(x4,x1) & n_thing(x1) & n_thing(x4) & n_stare(x2) & of(x2,x3) & n_clothing(x3) & a_drab(s2) & Theme(s2,x2) & n_youth(x1) & a_male(s1) & Theme(s1,x1))
-exists e1 x1.(all x2.(n_thing(x2) -> at(e1,x2)) & Actor(e1,x1) & v_look(e1) & n_person(x1))