SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function sum (alias dates_seen) (children 1)
            ExpressionList (children 1)
             Identifier last_seen
           Literal UInt64_1 (alias last_seen)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function sum (alias dates_seen) (children 1)
            ExpressionList (children 1)
             Identifier last_seen
           Literal UInt64_3 (alias last_seen)
   Function less (children 1)
    ExpressionList (children 2)
     Identifier last_seen
     Literal UInt64_2
