A girl on a bicycle doing a jump in the air with no hands.
The girl was doing a skateboarding trick.
The girl cannot be on a bicycle and skateboarding at the same time
exists e1 x1 x2 x3 x4 x5.(n_air(x5) & a_topic(x1) & on(x1,x2) & -exists x6.(with(e1,x6) & n_hand(x6)) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & in(x4,x5) & n_jump(x4) & (x2 = x3) & n_bicycle(x2) & n_girl(x1))
exists e2 e1 x1 x2.(n_girl(x1) & Theme(e2,x2) & Actor(e2,x1) & v_do(e2) & n_trick(x2) & Actor(e1,x2) & v_skateboard(e1))