SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 4)
    Function tuple (alias t) (children 1)
     ExpressionList (children 1)
      Literal \'Hello\' (alias world)
    Identifier t.world
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal \'world\'
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Function identity (children 1)
       ExpressionList (children 1)
        Identifier t
      Literal \'world\'
