A man in a white shirt is standing in a tent holding a banjo or guitar.
A man is about to play an instrument.
Just because you are holding a banjo or guitar does not mean you are going to play it.  He is going to play it.
exists e1 e2 s1 x1 x2 x3 x4.(for(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & (n_banjo(x4) | n_guitar(x4)) & in(e1,x3) & n_tent(x3) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2)) & n_man(x1))