How many countries had a lower relative poverty rate in the OECD compared to Denmark?
return Denmark ;return relative poverty rate of #1 ;return the  OECD ;return countries of #3 ;return relative poverty rates of #4 ;return #4 where #5 is lower than #2 ;return number of  #6
['select', 'project', 'select', 'project', 'project', 'comparative', 'aggregate']