A girl in a school uniform screams with a bug on her finger.
Nobody is screaming.
A girl is screaming is different from nobody screaming.
exists e1 x1 x2 x3 x4 x5.(with(e1,x4) & on(x4,x5) & n_finger(x5) & of(x5,x1) & n_female(x1) & n_bug(x4) & Actor(e1,x1) & v_scream(e1) & in(x1,x2) & n_uniform(x2) & of(x2,x3) & n_school(x3) & n_girl(x1))
-exists e1 x1.(Actor(e1,x1) & v_scream(e1) & n_person(x1))