A motorcyclist on a green bike is airborne.
A person is doing motorcycle tricks for the crowd.
just because the bike is airborne does not mean he is doing tricks and there may or may not be a crowd.
exists s1 s2 x1 x2.(Theme(s2,x1) & a_airborne(s2) & on(x1,x2) & n_bike(x2) & a_green(s1) & Theme(s1,x2) & n_motorcyclist(x1))
exists e1 x1 x2 x3 x4.(n_crowd(x4) & for(e1,x4) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & of(x2,x3) & n_motorcycle(x3) & n_person(x1))