A man sits behind a music stand playing the guitar while people perform in the background.
He prepares for his accordian solo
If the man is playing the guitar he is not preparing for his accordian solo.
exists e1 e2 p1 x1 x2 x3 x4 x5 x7.(n_background(x7) & n_guitar(x5) & behind(e1,x2) & exists e3 x6.(in(e3,x7) & Actor(e3,x6) & v_perform(e3) & n_people(x6)) & while(e2,p1) & Theme(e2,x5) & Actor(e2,x4) & v_play(e2) & (x2 = x4) & n_stand(x2) & of(x2,x3) & n_music(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(n_solo(x2) & of(x2,x3) & n_accordian(x3) & of(x2,x1) & n_male(x1) & n_male(x1) & for(e1,x2) & Actor(e1,x1) & v_prepare(e1))