A group of people are running, and some of the runners are wearing the Native Americans headdress.
The people with Native American headdresses are dancing in the park.
One can not be running and dancing simultaneously.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6.(n_headdress(x5) & (x5 = x6) & ne_nam_americans(x6) & a_native(s1) & Theme(s1,x5) & n_runner(x4) & Theme(e2,x5) & Actor(e2,x3) & v_wear(e2) & of(x3,x4) & n_thing(x3) & Actor(e1,x1) & v_run(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 s1 s2 x1 x2 x3.(n_park(x3) & n_people(x1) & in(e1,x3) & Actor(e1,x1) & v_dance(e1) & with(x1,x2) & n_headdress(x2) & a_american(s2) & Theme(s2,x2) & a_native(s1) & Theme(s1,x2))