A man with shaggy blond-hair singing and playing a guitar.
The man is serenading his girlfriend
Just because the man is singing and playing guitar doesn't mean he is serenading his girlfriend.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & with(x1,x2) & subset_of(e1,x2) & Theme(e1,x5) & Actor(e1,x4) & v_play(e1) & n_guitar(x5) & n_thing(x4) & subset_of(x3,x2) & n_singing(x3) & a_blond-hair(s2) & Theme(s2,x3) & a_shaggy(s1) & Theme(s1,x3) & n_man(x1))
exists e1 x1 x2.(n_girlfriend(x2) & of(x2,x1) & n_male(x1) & n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_serenade(e1))