A man is pushing a cart down the beach.
A homeless man is looking for cans.
Not all men pushing carts are homeless. Pushing a cart down the beach does not imply that someone is looking for cans.
exists e1 x1 x2 x3.(n_beach(x3) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_push(e1) & n_cart(x2) & n_man(x1))
exists e1 s1 x1 x2.(for(e1,x2) & n_can(x2) & Actor(e1,x1) & v_look(e1) & n_man(x1) & a_homeless(s1) & Theme(s1,x1))