return me the area of the VLDB conference .
SELECT t2.name FROM domain_conference AS t3 JOIN conference AS t1 ON t3.cid  =  t1.cid JOIN DOMAIN AS t2 ON t2.did  =  t3.did WHERE t1.name  =  "VLDB";
SELECT t2.name FROM domain_conference AS t3 JOIN conference AS t1 ON t3.cid  =  t1.cid JOIN DOMAIN AS t2 ON t2.did  =  t3.did WHERE t1.name  =  "VLDB";
[{'Nenhum': 'Nenhum resultado encontrado'}]