Three people are on a boat in the middle of the water while the sun is in the back.
Two people are sitting on a boat.
Three people are different from Two people.
exists p1 p2 x1 x2 x3 x5 x6.(n_back(x6) & n_sun(x5) & n_water(x3) & n_middle(x2) & exists p3.in(x5,x6) & while(p1,p2) & in(p1,x2) & of(x2,x3) & exists x4.(on(x1,x4) & n_boat(x4)) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(on(e1,x2) & n_boat(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_2(x1))