Work with two xmls and combine them using xsl

I have the feed from two different sources.I need to
combine both of them and produce a common list.


How do I read from two xml files in xsl and produce
the list of events?
For eg: 

First.xml

<?xml version=1.1>
<eventname>first-eve</eventname>
<eventtitle>first-title<eventtitle>
..

Second.xml
<?xml version=1.1>
<eventname>second-eve</eventname>
<eventtitle>second-title<eventtitle>
..

Now after applying xsl transformation of both of the
above xmls, I should get:

EventName: 	first-eve
Event Title:	first-title

EventName: 	second-eve
Event Title:	second-title