Three people are in a sailboat on the water.
A group of people are swimming.
Sailboat and swimming are different.
exists p1 x1 x3.(n_water(x3) & exists x2.(in(x1,x2) & on(x2,x3) & n_sailboat(x2)) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(Actor(e1,x1) & v_swim(e1) & of(x1,x2) & n_people(x2) & n_group(x1))