People wearing swimming suits playing in the water.
No one is playing in the water
If people are playing in the water, it can't be said no one is playing in the water.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_water(x6) & a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_wear(e2) & in(e1,x6) & Actor(e1,x5) & v_play(e1) & (x3 = x5) & n_suit(x3) & of(x3,x4) & n_swimming(x4) & (x1 = x2) & n_people(x1))
exists x2.(n_water(x2) & -exists e1 x1.(in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_one(x1)))