A motorcycle rider navigating his bike over a stone obstacle.
A person in a car is stuck behind pigs crossing.
The person cannot be riding a motorcycle and car at the same time.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & over(e1,x5) & n_obstacle(x5) & of(x5,x6) & n_stone(x6) & Theme(e1,x4) & Actor(e1,x3) & v_navigate(e1) & n_bike(x4) & of(x4,x1) & n_male(x1) & (x1 = x3) & n_rider(x1) & of(x1,x2) & n_motorcycle(x2))
exists e2 e1 x1 x2 x3 x4.(behind(e1,x3) & Actor(e2,x4) & v_cross(e2) & (x3 = x4) & n_pig(x3) & Theme(e1,x1) & v_stick(e1) & in(x1,x2) & n_car(x2) & n_person(x1))