Teens dressed as Native Americans sit in the park with their school bags on the ground.
The teens are outside
Same teens are outside. A park is outside.
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 s1 x1.(n_teens(x1) & Theme(s1,x1) & a_outside(s1))