About: http://webisa.webdatacommons.org/297855196

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They look heavy and strong but in reality they need to extremely durable to absorb all kinds of shocks for a long time.
http://www.w3.org/ns/prov#wasQuotedFrom	mmastop.com