A band is on stage performing.
The band is playing their famous song
Performing does not imply they are playing their famous song.
exists p1 x1.(exists x2 x3.(on(x1,x2) & n_perform(x2) & of(x2,x3) & n_stage(x3)) & n_band(x1))
exists e1 s1 x1 x2.(n_song(x2) & a_famous(s1) & Theme(s1,x2) & of(x2,x1) & n_thing(x1) & n_band(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))