A family prepares to ride on the water.
Riding on water is known as sailing.
riding on water is a rephrasing of ride on the water
exists e1 p1 x1 x2.(n_water(x2) & Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2.(on(e2,x2) & Actor(e2,x1) & v_ride(e2)) & n_family(x1))
exists e2 e1 x1 x2 x3.(as(e2,x3) & n_sailing(x3) & Theme(e2,e1) & v_know(e2) & on(e1,x2) & n_water(x2) & Actor(e1,x1) & v_ride(e1) & n_thing(x1))