A parasurfer is airborne over the water.
A man is driving a boat with his feet.
if the parasurfer is airborne he cannot be driving a boat with his feet
exists s1 x1 x2.(n_water(x2) & over(s1,x2) & Theme(s1,x1) & a_airborne(s1) & n_parasurfer(x1))
exists e1 x1 x2 x3.(with(e1,x3) & n_foot(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_boat(x2) & n_man(x1))