These women are collecting dirt for some unknown reason.
The women are old.
We don't know that the women are old.
exists e1 s1 x1 x2 x3.(n_woman(x1) & for(e1,x3) & n_reason(x3) & a_unknown(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_collect(e1) & n_dirt(x2))
exists s1 x1.(n_woman(x1) & Theme(s1,x1) & a_old(s1))