A man wearing a black shirt is looking at a binder on a music stand while playing a guitar.
A man is picking a new song to learn.
The fact that a man is looking at a binder on a music stand while playing a guitar doesn't imply that he is picking a new song to learn.
exists e2 e3 e1 s1 x1 x2 x3 x4 x5 x6 x7.(while(e2,e3) & Theme(e3,x7) & Actor(e3,x1) & v_play(e3) & n_guitar(x7) & at(e2,x4) & on(x4,x5) & n_stand(x5) & of(x5,x6) & n_music(x6) & n_binder(x4) & Actor(e2,x1) & v_look(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_black(s1) & Theme(s1,x3) & (x1 = x2) & n_man(x1))
exists e1 p1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_pick(e1) & Topic(x2,p1) & exists e2 x3.(Theme(e2,x3) & Actor(e2,x2) & v_learn(e2) & n_thing(x3)) & n_song(x2) & a_new(s1) & Theme(s1,x2) & n_man(x1))