SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function trimBoth (children 1)
     ExpressionList (children 2)
      Literal \'$$both$$\'
      Function concat (children 1)
       ExpressionList (children 2)
        Literal \'$\'
        Literal \'$\'
    Function trimBoth (children 1)
     ExpressionList (children 2)
      Literal \'$$both$$\'
      Literal \'$$\'
