A woman with a cart of vegetables.
A boy writing a paper.
It is either a woman or a boy.
exists x1 x2 x3.(a_topic(x1) & with(x1,x2) & of(x2,x3) & n_vegetable(x3) & n_cart(x2) & n_woman(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_write(e1) & n_paper(x3) & (x1 = x2) & n_boy(x1))