<http://www.playbill.com/article/playbill-vaults-today-in-theatre-history-august-31-com-107967>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://web.playbill.com/article/playbill-vaults-today-in-theatre-history-august-31-com-107967>