There are several people in a park.
There are people talking at the park.
People can be together or separate in a park without talking, there is nothing to indicate that this is taking place.
exists p1 x1 x2.(in(p1,x2) & n_park(x2) & exists s1 x3.((x1 = x3) & n_people(x3) & a_several(s1) & Theme(s1,x3)))
exists p1 x1 x4.(n_park(x4) & exists e1 x2 x3.((x1 = x2) & at(e1,x4) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_people(x2)))