A man on a dirt bike is flying through the air.
The man is walking through a field of sunflowers.
If he's on a dirt bike he can't be walking.
exists e1 x1 x2 x3 x4.(n_air(x4) & through(e1,x4) & Actor(e1,x1) & v_fly(e1) & on(x1,x2) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & through(e1,x2) & of(x2,x3) & n_sunflower(x3) & n_field(x2) & Actor(e1,x1) & v_walk(e1))