select ?z, ?y, ?x 
from http://example.com,  http://exampleagain.com 
where 
 (?z http://jdsfhgjfhk ddd::bla)
 (?z http://jdahgfkjasdhgkj ?y)
 and ?z > 5
 and ?z == 4
 and ?z like 'jfdhgkj'
 using
 ddd for http://asdgjkasjdgklasj
 aaa for http://asdgjfadglad/asdfdja