A woman cleaning up a park.
The old man is sweeping his driveway.
There can be either a woman cleaning up a park or a man sweeping his driveway.
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_clean(e1) & n_park(x3) & (x1 = x2) & n_woman(x1))
exists e1 s1 x1 x2.(n_driveway(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & a_old(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1))