return me the number of keywords, which have been contained by more than 10 papers of " H. V. Jagadish " . 
return H. V. Jagadish ;return papers of #1 ;return keywords of #2 ;return number of  #2 for each #3 ;return #3 where #4 is higher than 10 ;return number of  #5
['select', 'project', 'project', 'group', 'comparative', 'aggregate']