SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier key
    Function untuple (children 1)
     ExpressionList (children 1)
      Function argMax (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Asterisk (children 1)
           ColumnsTransformerList (children 1)
            ColumnsExceptTransformer (children 1)
             Identifier key
        Identifier v1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier kv
   ExpressionList (children 1)
    Identifier key
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier key
 Identifier TSVWithNames