A girl in a blue swimsuit walks into the ocean.
Nobody is walking.
If a girl is walking, it can't be said that nobody is walking.
exists e1 s1 x1 x2 x3.(n_ocean(x3) & into(e1,x3) & Actor(e1,x1) & v_walk(e1) & in(x1,x2) & n_swimsuit(x2) & a_blue(s1) & Theme(s1,x2) & n_girl(x1))
-exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_person(x1))