SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier customer
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias n) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 1)
           Identifier n_nationkey
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier nation
          Function equals (children 1)
           ExpressionList (children 2)
            Identifier n_name
            Literal \'WAKANDA\'
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier c_nationkey
        Identifier n.n_nationkey
