return me the paper after 2000 in VLDB conference with more than 200 citations . 
return VLDB conferences ;return papers of #1 ;return #2 that are after 2000 ;return citations of #3 ;return number of  #4 for each #3 ;return #3 where #5 is more than 200
['select', 'project', 'filter', 'project', 'group', 'comparative']