A local band has a gig in a hall
A band performing a requested song
A band performing a gig in a hall is not necessarily performing a requested song.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_hall(x3) & n_gig(x2) & n_band(x1) & a_local(s1) & Theme(s1,x1))
exists e1 e2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_request(e2) & n_song(x4) & Theme(e1,x3) & Actor(e1,x2) & v_perform(e1) & n_a(x3) & (x1 = x2) & n_band(x1))