A young man is jumping over a long pole at a skate park.
The man is wearing a helmet.
A young man at a skate park may not be wearing a helmet.
exists e1 s1 s2 x1 x2 x3 x4.(at(e1,x3) & n_park(x3) & of(x3,x4) & n_skate(x4) & over(e1,x2) & n_pole(x2) & a_long(s2) & Theme(s2,x2) & Actor(e1,x1) & v_jump(e1) & n_man(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_helmet(x2))