Which claims had exactly one settlement? For each, tell me the the date the claim was made, the date it was settled and the amount settled.
return claims ;return settlements of #1 ;return number of  #2 for each #1 ;return #1 where #3 is  one ;return dates that  #4 was made ;return dates that  #4 was settled ;return the   amounts settled in #4 ;return #5 ,  #6 ,   #7
['select', 'project', 'group', 'comparative', 'project', 'project', 'project', 'union']