<http://schema.org/description>
"American troops going into action during the Battle of St Mihiel, north eastern France, First World War. A sketch by A Smith. Date: 13 September 1918"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mediastorehouse.com/american-troops-battle-of-st-mihiel-france-ww1/print/7196747.html>