A man walking across a patch of grass in the middle of a street.
The man is riding a horse.
A man can't be walking and riding a horse simultaneously.
exists e1 x1 x2 x3 x4 x5 x6.(n_middle(x5) & a_topic(x1) & in(e1,x5) & of(x5,x6) & n_street(x6) & across(e1,x3) & of(x3,x4) & n_grass(x4) & n_patch(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2))