A band is on a stage and there is a man in a white costume.
The band is playing sad songs.
You can not infer they are sad.
exists p1 p2 x1 x2.(exists s1 x4 x5.((x2 = x4) & in(x4,x5) & n_costume(x5) & a_white(s1) & Theme(s1,x5) & n_man(x4)) & exists x3.(on(x1,x3) & n_stage(x3)) & n_band(x1))
exists e1 s1 x1 x2.(n_band(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_song(x2) & a_sad(s1) & Theme(s1,x2))