A park is the background but it is focused on three young girls walking together.
The group of people playing in a park.
Girls walking together in a park are not necessarily playing.
exists e2 e1 p1 s1 s2 x1 x2 x3 x4.(n_background(x4) & on(e1,x2) & a_together(s2) & Manner(e2,s2) & Actor(e2,x3) & v_walk(e2) & (x2 = x3) & n_girl(x2) & a_young(s1) & Theme(s1,x2) & card_eq_3(x2) & Theme(e1,x1) & v_focus(e1) & n_thing(x1) & (x1 = x4) & n_park(x1))
exists e1 x1 x2 x3 x4.(n_group(x1) & a_topic(x1) & of(x1,x2) & in(e1,x4) & n_park(x4) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_people(x2))