A skateboarder wearing all black is riding down the railing and there is a black motorcycle in front of the railing.
person does new trick
Skateboarding down a railing does not have to be a new trick for a person.
exists e1 p1 s1 x1 x2 x3 x4.(n_railing(x3) & n_railing(x3) & exists s2 x6 x7.((x4 = x6) & in(x6,x7) & of(x7,x3) & n_front(x7) & n_motorcycle(x6) & a_black(s2) & Theme(s2,x6)) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & all x5.(n_black(x5) -> exists e2.(Theme(e2,x5) & Actor(e2,x2) & v_wear(e2))) & (x1 = x2) & n_skateboarder(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & a_new(s1) & Theme(s1,x2) & n_person(x1))