Group performs a dance together.
Singers perform karaoke
Dance is not the same as karaoke.
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.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_karaoke(x2) & n_singer(x1))