A man getting thrown from his horse.
The man is in a room alone.
A man is not in a room alone if he is getting thrown from his horse
exists e1 p1 x1 x2 x3.(a_topic(x1) & exists e2.(from(e2,x3) & Theme(e2,x2) & v_throw(e2)) & n_horse(x3) & of(x3,x1) & n_male(x1) & Topic(e1,p1) & Actor(e1,x2) & v_get(e1) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.(in(x1,x2) & r_alone(x2) & n_room(x2)))