A man playing an instrument underneath some stairs and a red car in the background.
Music is being played by someone in front of a vehicle.
A man is also someone.  Playing an instrument means music is being played.  If he is in front of a vehicle then the car is in the background.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_background(x7) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & subset_of(x6,x3) & in(x6,x7) & n_car(x6) & a_red(s1) & Theme(s1,x6) & subset_of(x4,x3) & underneath(x4,x5) & n_stair(x5) & n_instrument(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3 x4.(ne_nam_music(x1) & Actor(e1,x2) & of(x2,x4) & n_vehicle(x4) & in(x2,x3) & n_front(x3) & n_person(x2) & Theme(e1,x1) & v_play(e1))