A band is performing indoors.
A band is performing.
It has already been stated that a band is performing.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_indoor(x2) & n_band(x1))
exists e1 x1.(Actor(e1,x1) & v_perform(e1) & n_band(x1))