Indigenous people preparing for a festival dance at night.
Foriengers are helping prepare for the festival.
Indigenous people doesn't explicitly signifies foriengers.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & at(e1,x5) & n_night(x5) & for(e1,x3) & n_dance(x3) & of(x3,x4) & n_festival(x4) & Actor(e1,x2) & v_prepare(e1) & (x1 = x2) & n_people(x1) & a_indigenous(s1) & Theme(s1,x1))
exists e1 p1 x1 x2.(n_festival(x2) & exists e2.(for(e2,x2) & Actor(e2,x1) & v_prepare(e2)) & Topic(e1,p1) & Actor(e1,x1) & v_help(e1) & n_forienger(x1))