A brown dog jumping over an obstacle hurdle.
A dog sitting on a train.
Sitting can't be done while jumping.  An obstacle hurdle wouldn't usually be on a train.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x3) & n_hurdle(x3) & of(x3,x4) & n_obstacle(x4) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_train(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_dog(x1))