<http://schema.org/description>
"An illustration by H. W. Koekkoek to suggest how German submarines re-fuelled. With increased activity by German submarines, there was some speculation about this matter. The illustration shows divers drawing fuel from a submersible supply-boat."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mediastorehouse.com/german-submarines-getting-supplies/print/4383013.html>