A man playing an instrument in front of a wall with a sign on it.
A man is playing music in front of  a wall.
As he is playing an instrument, it is implied that the man is playing music.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x4) & of(x4,x5) & on(x5,x1) & n_thing(x1) & with(x5,x6) & n_sign(x6) & n_wall(x5) & n_front(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_instrument(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_wall(x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_music(x2) & n_man(x1))