Among all the claims, which settlements have a claimed amount that is no more than the average? List the claim start date.
return claims ;return settlements of  #1 ;return claimed amounts of  #2 ;return average of  #3 ;return #1 where #3 is  at most #4 ;return claim start dates of  #5
['select', 'project', 'project', 'aggregate', 'comparative', 'project']