A man singing while playing guitar with passion.
A man in concert.
Just because the man is singing, doesn't mean he is at a concert.
exists e2 e1 x1 x2 x3 x4.(a_topic(x1) & while(e1,e2) & with(e2,x4) & n_passion(x4) & Theme(e2,x3) & Actor(e2,x2) & v_play(e2) & n_guitar(x3) & Actor(e1,x2) & v_sing(e1) & (x1 = x2) & n_man(x1))
exists x1 x2.(a_topic(x1) & in(x1,x2) & n_concert(x2) & n_man(x1))