Boat sails in rough water.
A car drives over the desert
There is either a boat or a car. One either sails or drives. There is either water or a desert.
exists e1 s1 x1 x2.(ne_nam_boat(x1) & in(e1,x2) & n_water(x2) & a_rough(s1) & Theme(s1,x2) & Actor(e1,x1) & v_sail(e1))
exists x1 x2 x3.(n_desert(x3) & a_topic(x1) & over(x1,x3) & n_drive(x1) & of(x1,x2) & n_car(x2))