Virtuoso SPARQL endpoint incorrect results

Hello all.
I was using the SPARQL query endpoint provided by DBPedia. I came across this problem when I ran the following query on the DBPedia dataset:

Select distinct x
where {dbr:The_Beatles dbo:formerBandMember ?x.
?x ?ijGlSb ?UmRxkM.
?x ?pWtinT ?oFdzJq.
?x ?kcyeZy ?sQbrym.} LIMIT 100
The variables used in the query were automatically generated unique keys by the RDF application I was using. The above query obviously should return the list of all ‘Beatles’ band member as there is no join condition except being a member of the band. But the above query returned
" " as the answer.