How many Olympians each won 4 or more medals in 2010, 2014, and 2018?
return Olympians ;return medals that #1 won ;return #2 in  2010 ;return #2 in  2014 ;return #2 in  2018 ;return number of  #3 for each #1 ;return number of  #4 for each #1 ;return number of  #5 for each #1 ;return #1 where #6 is at least 4 ;return #1 where #7 is at least 4 ;return #1 where #8 is at least 4 ;return number of  #9 ;return number of  #10 ;return number of  #11 ;return sum of #12 and  #13 ;return sum of #15 and  #14
['select', 'project', 'filter', 'filter', 'filter', 'group', 'group', 'group', 'comparative', 'comparative', 'comparative', 'aggregate', 'aggregate', 'aggregate', 'arithmetic', 'arithmetic']