Remove header by XSLT Mapping

Hello Experts,

I have an incoming XML coming through HTTP protocol which consiste of Header and the data is like below.

<?xml version="1.0" encoding="utf-8"?>

http://schemas.xmlsoap.org/soap/envelope/

<?xml version="1.0" encoding="utf-8"?>

<PurchaseOrder>

</PurchaseOrder>

Footer

I need only the lines in bold.

Can any one help

Regards,

Arijit