A woman sings on stage as a man plays an instrument in unison with her vocals.
The man is playing the saxophone.
Not all instruments are a saxophone.
exists e1 p1 x1 x2 x6.(exists e2 x3 x4 x5.(in(e2,x5) & with(x5,x6) & n_unison(x5) & Theme(e2,x4) & Actor(e2,x3) & v_play(e2) & n_instrument(x4) & n_man(x3)) & n_vocal(x6) & of(x6,x1) & n_female(x1) & as(e1,p1) & on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_sing(e1) & n_woman(x1))
exists e1 x1 x2.(n_saxophone(x2) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))