A couple sits at a red table.
The couple are engaged.
Not all couples are engaged.
exists e1 s1 x1 x2.(at(e1,x2) & n_table(x2) & a_red(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))
exists e1 x1.(n_couple(x1) & Theme(e1,x1) & v_engage(e1))