A skateboarder's hair flies through the air.
The skateborder is riding a bike.
flies   is not the same as riding
exists e1 x1 x2 x3.(n_air(x3) & through(e1,x3) & Actor(e1,x2) & v_fly(e1) & n_hair(x2) & of(x2,x1) & n_skateboarder(x1))
exists e1 x1 x2.(n_skateborder(x1) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2))