<https://dawlishchronicles.com/2018/11/13/sailing-craft-versus-u-boats-in-ww1/german_uc-1_class_submarine/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://dawlishchronicles.com/2018/11/13/sailing-craft-versus-u-boats-in-ww1/german_uc-1_class_submarine/>