Luyện nghe bài hát Knockin On Heavens Door

"Knockin' on Door" is a Bob Dylan song from 1973. The girls
have been it now and then since at least 1988. There's
something about the version that kinda confuses me... See,
the official Dylan sheet has two verses:
Mama, take badge off of me
I can't use it
It's dark, too dark for me to see
I feel like I'm knockin' on door
Knock, knock, knockin' on door...
Mama, put my in the ground
I can't them anymore
That black cloud is comin' down
I feel like I'm knockin' on door
Knock, knock, on heaven's door...
I know that Dylan often sings a third verse live:
Mama, wipe the blood my face
I can't see through it
It's a feeling I just can't trace
I feel like I'm on heaven's door
Knock, knock, knockin' on door...
in every IG version I have, Amy sings the following third

Mama, this blood from my face
I can't see through the
Six white horses coming to me away
I feel like I'm on heaven's door
Knock, knock, on heaven's door...
So, I don't know whether Amy Dylan's third verse, or whether
it's from some Dylan version I know. What I'm trying to say is
that I don't know whether to attribute the "six horses" line to
or to Amy.
To further complicate matters, got one version that features a
verse, sung by Michelle Malone. This verse breaks both the
meter and the rhyme scheme (ABBB in of ABAB), so I'm willing to
bet it's just Ms. Malone improvising...
Mama, these chains off of me
'Cause I don't them anymore
They're getting too heavy, I'm crawling across the floor
I feel I'm knockin' on heaven's door
Knock, knock, on heaven's door...
Oh - BTW - the first person who asks me the "Guns-n-Roses"
version feel my wrath...
-Vic.
.