A dark-skinned security officer smiles.
An army officer smiles at a pretty lady.
Smiling does not necessarily imply the presence of a pretty lady
exists e1 s1 x1 x2.(Actor(e1,x1) & v_smile(e1) & n_officer(x1) & of(x1,x2) & n_security(x2) & a_dark-skinned(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_lady(x3) & a_pretty(s1) & Theme(s1,x3) & Actor(e1,x1) & v_smile(e1) & n_officer(x1) & of(x1,x2) & n_army(x2))