Teens dressed as Native Americans sit in the park with their school bags on the ground.
There are children dressed as clowns.
it either Native Americans or clowns
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 p1 x1 e1 x2 x3 x4.((x1 = x2) & as(e1,x4) & n_clown(x4) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_child(x2))