A quad sends dirt flying into the air.
The Four wheeler is spinning it wheels in the dirt.
A quad is a four wheeler.
exists e2 e1 x1 x2 x3.(n_air(x3) & for(e1,e2) & into(e2,x3) & Actor(e2,x1) & v_fly(e2) & Theme(e1,x2) & Actor(e1,x1) & v_send(e1) & n_dirt(x2) & n_quad(x1))
exists e1 s1 x1 x2 x3.(n_dirt(x3) & n_wheeler(x1) & card_eq_4(x1) & Theme(e1,x2) & Actor(e1,x1) & v_spin(e1) & in(x2,x3) & n_wheel(x2) & a_it(s1) & Theme(s1,x2))