a group of people sitting on the ground on the sidewalk
The sidewalk is next to a park
Not every sidewalk is next to a park.
exists e1 x1 x2 x3 x4 x5.(n_sidewalk(x5) & n_ground(x4) & a_topic(x1) & of(x1,x2) & on(e1,x4) & on(x4,x5) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists s1 x1 x2.(n_sidewalk(x1) & to(s1,x2) & n_park(x2) & Theme(s1,x1) & a_next(s1))