Native Americans are dressed up in native clothing and are participating in an activity together.
The Native Americans are participating in an old ritual.
The native Americans are not necessarily doing an old ritual just because they are doing an activity
exists e2 e1 s1 s2 s3 s4 s5 x1 x2 x3.(ne_nam_americans(x1) & a_native(s4) & Theme(s4,x1) & a_native(s1) & Theme(s1,x1) & a_together(s5) & Manner(e2,s5) & in(e2,x3) & n_activity(x3) & Actor(e2,x1) & v_participate(e2) & in(e1,x2) & n_clothing(x2) & a_native(s3) & Theme(s3,x2) & a_up(s2) & Manner(e1,s2) & Theme(e1,x1) & v_dress(e1))
exists e1 s1 s2 x1 x2.(ne_nam_americans(x1) & a_native(s1) & Theme(s1,x1) & in(e1,x2) & n_ritual(x2) & a_old(s2) & Theme(s2,x2) & Actor(e1,x1) & v_participate(e1))