What is the 3 most common cloud cover rates in the region of zip code 94107?
return regions ;return zip codes of #1 ;return #1 where #2 is 94107 ;return cloud cover rates of #3 ;return number of  #4 for each cloud cover rate ;return the  3 highest of #5 ;return #4 where #5 is equal to any of #6
['select', 'project', 'comparative', 'project', 'group', 'aggregate', 'comparative']