A choir is standing up on a podium singing a song.
A choir are in the aisle singing a song.
There would not be a podium in an aisle so they would not be on a podium while in an aisle.
exists e1 e2 s1 x1 x2 x3.(for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_sing(e2) & n_song(x3) & on(e1,x2) & n_podium(x2) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_choir(x1))
exists p1 x1 x2.(n_aisle(x2) & exists e1 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_sing(e1) & n_song(x4) & (x2 = x3)) & n_choir(x1))