Twp children dig holes in the dirt.
A boy and girl are digging holes.
Not all two children are necessarily a boy and a girl
exists e1 x1 x2 x3 x4.(n_dirt(x4) & in(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_dig(e1) & n_hole(x3) & n_child(x1) & (x1 = x2) & ne_nam_twp(x2))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_dig(e1) & n_hole(x4) & n_girl(x3) & n_boy(x2) & subset_of(x3,x1) & subset_of(x2,x1))