Workmen digging a trench.
a woman is digging
There is either a woman or workmen.
exists e1 x1 x2.(ne_nam_workmen(x1) & Theme(e1,x2) & Actor(e1,x1) & v_dig(e1) & n_trench(x2))
exists e1 x1.(Actor(e1,x1) & v_dig(e1) & n_woman(x1))