It's a rock version of The Fields Of Athenry, but there's been so many artists who have covered it.....
http://en.wikipedia.org/wiki/The_Fields_of_Athenry
I think it's this part of the song
Low lie the Fields of Athenry
Where once we watched the small free birds fly.
Our love was on the wing we had dreams and songs to sing
It's so lonely 'round the Fields of Athenry.
By a lonely prison wall
I heard a young man calling
Nothing matter Mary when your free,
Against the Famine and the Crown
I rebelled they ran me down
Now you must raise our child with dignity.
That you can hear being sung.