PREFIX : <http://example/>
SELECT *
{
##   {
##     ?z ?q ?w . 
##     ?x :p ?v . 
##     FILTER(?v = "2")
##    } UNION 
   {
    ?z ?q ?w . 
    ?z :p ?v . 
    ?x :p "1" . 
    :x1 ?p "x" . 
    FILTER(?v > 5 )
   }
}
LIMIT 5