return me the papers on PVLDB .
SELECT t2.title FROM publication AS t2 JOIN journal AS t1 ON t2.jid  =  t1.jid WHERE t1.name  =  "PVLDB";
SELECT t2.title FROM publication AS t2 JOIN journal AS t1 ON t2.jid  =  t1.jid WHERE t1.name  =  "PVLDB";
[{'Nenhum': 'Nenhum resultado encontrado'}]