A person rides a motorbike through the air.
A rider is riding a bicycle
motorbike ≠ bicycle
exists e1 x1 x2 x3.(n_air(x3) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_motorbike(x2) & n_person(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x2) & n_rider(x1))