A bunch of kids and adults playing with different colored balls on a rock sidewalk.
some people are working on something.
People or children who are playing would not normally be working on something.
exists e3 e1 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_ball(x7) & Theme(e3,x7) & v_color(e3) & a_topic(x1) & of(x1,x2) & with(e1,x6) & on(x6,x8) & n_sidewalk(x8) & of(x8,x9) & n_rock(x9) & -(x6 = x7) & n_ball(x6) & Theme(e2,x6) & v_color(e2) & Actor(e1,x5) & v_play(e1) & (x2 = x5) & subset_of(x4,x2) & n_adult(x4) & subset_of(x3,x2) & n_kid(x3) & n_bunch(x1))
exists e1 x1 x2.(on(e1,x2) & n_thing(x2) & Actor(e1,x1) & v_work(e1) & n_people(x1))