Jumping a bicycle onto a park bench.
The kid rides his skateboard.
The kid cannot be riding his skateboard and a bicycle at the same time.
exists e1 x1 x2 x3 x4.(onto(e1,x3) & n_bench(x3) & of(x3,x4) & n_park(x4) & Theme(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_bicycle(x2) & n_thing(x1))
exists e1 x1 x2.(n_skateboard(x2) & of(x2,x1) & n_male(x1) & n_kid(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))