Teens dressed as Native Americans sit in the park with their school bags on the ground.
teens running
You cant sit and run at the same time
exists e1 p1 s1 x1 x2 x3 x4 x5 x6.(n_ground(x6) & n_bag(x4) & of(x4,x5) & n_school(x5) & of(x4,x3) & n_thing(x3) & n_park(x3) & ne_nam_americans(x2) & a_native(s1) & Theme(s1,x2) & exists e2.(on(e2,x6) & in(e2,x3) & with(x3,x4) & Actor(e2,x2) & v_sit(e2)) & as(e1,p1) & Actor(e1,x1) & v_dress(e1) & n_teens(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_teens(x1))