Group practices some cultural dances.
Cultural dances are being performed at a competition.
Practices some cultural dances doesn't imply being performed at a competition.
exists e1 s1 x1 x2.(ne_org_group(x1) & Theme(e1,x2) & Actor(e1,x1) & v_practice(e1) & n_dance(x2) & a_cultural(s1) & Theme(s1,x2))
exists e1 x1 x2 x3.(at(e1,x3) & n_competition(x3) & Theme(e1,x1) & v_perform(e1) & n_dance(x1) & (x1 = x2) & ne_nam_cultural(x2))