A female cleans the area in front of a door by sweeping.
A woman sweeps the porch.
The area in front of a door is not necessarily a porch.
exists s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x3) & of(x3,x4) & by(x4,x5) & n_sweep(x5) & n_door(x4) & n_front(x3) & n_area(x2) & (x1 = x2) & n_clean(x1) & a_female(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_porch(x2) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & n_woman(x1))