A man sits behind a music stand playing the guitar while people perform in the background.
He is the start of the concert as he prepares to play his solo
Just because the man is playing the guitar, it doesn't mean that he is the start of the concert.
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 p1 p2 x1 x2 x3 x4.(n_solo(x4) & of(x4,x1) & n_male(x1) & n_male(x1) & n_male(x1) & n_concert(x3) & n_start(x2) & exists e1 p3.(Topic(e1,p3) & Actor(e1,x1) & v_prepare(e1) & exists e2.(Theme(e2,x4) & Actor(e2,x1) & v_play(e2))) & as(p1,p2) & (x1 = x2) & of(x2,x3))