Two women are posing on a stage with a darkened background, with their arms raised slightly.
two wom are performing a song
Nothing in the first sentence mentions preforming a song.
exists e2 e1 s1 s2 x1 x2 x3 x4.(a_slightly(s2) & Manner(e2,s2) & Theme(e2,x4) & v_raise(e2) & with(e1,x4) & n_arm(x4) & of(x4,x1) & n_thing(x1) & on(e1,x2) & with(x2,x3) & n_background(x3) & a_darkened(s1) & Theme(s1,x3) & n_stage(x2) & Actor(e1,x1) & v_pose(e1) & n_woman(x1) & card_eq_2(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_song(x2) & n_wom(x1) & card_eq_2(x1))