A man in a blue cap is playing a guitar while a young girl sits on a stool across from him and listens.
A man serenades a woman with a song he wrote on his guitar.
Although a young girl is listening, it does not imply he serenades her.  Playing a guitar does not imply he wrote the song.
exists e1 p1 s1 x1 x2 x3.(exists e2 s2 s3 x4 x5 x6 x7.(from(e2,x6) & subset_of(x7,x6) & n_listen(x7) & subset_of(x1,x6) & a_across(s3) & Manner(e2,s3) & on(e2,x5) & n_stool(x5) & Actor(e2,x4) & v_sit(e2) & n_girl(x4) & a_young(s2) & Theme(s2,x4)) & n_male(x1) & while(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_guitar(x3) & in(x1,x2) & n_cap(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x2) & Actor(e2,x1) & v_serenade(e2) & with(x2,x3) & on(e1,x5) & n_guitar(x5) & of(x5,x1) & n_male(x1) & n_male(x1) & Theme(e1,x4) & Actor(e1,x1) & v_write(e1) & (x3 = x4) & n_song(x3) & n_woman(x2) & n_man(x1))