A longboarder catches himself before hitting the ground.
A longboarder has his dog with him.
The longboarder cannot catch himself if he has his dog with him
exists e2 e1 x1 x2 x3.(n_ground(x3) & n_male(x2) & before(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_hit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_catch(e1) & n_longboarder(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & with(x2,x1) & n_male(x1) & n_male(x1) & n_dog(x2) & of(x2,x1) & n_longboarder(x1))