A person on a dirt bike is in the air.
The person is sitting on a pink moped.
Dirt bike ≠ moped
exists p1 x1 x2 x3 x4.(n_air(x4) & in(x1,x4) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_person(x1))
exists e1 s1 x1 x2.(n_person(x1) & on(e1,x2) & n_moped(x2) & a_pink(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sit(e1))