A beach with people standing on the sand
People are preparing to swim at the beach.
A beach with people standing on the sand doesn't mean they are preparing to swim.
exists e1 x1 x2 x3 x4.(n_sand(x4) & a_topic(x1) & with(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_stand(e1) & (x2 = x3) & n_people(x2) & n_beach(x1))
exists e1 p1 x1 x2.(n_beach(x2) & Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2.(at(e2,x2) & Actor(e2,x1) & v_swim(e2)) & n_people(x1))