SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   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)
      TableIdentifier nation
     TableJoin
   Function and (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier c_nationkey
       Identifier n_nationkey
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier n_name
       Literal \'WAKANDA\'
