Group performs a dance together.
The group are dancing in a competition.
When you dance together, it need not be a competition only,
exists e1 s1 x1 x2.(ne_org_group(x1) & a_together(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_dance(x2))
exists e1 x1 x2.(n_group(x1) & in(e1,x2) & n_competition(x2) & Actor(e1,x1) & v_dance(e1))