About: http://webisa.webdatacommons.org/21643148

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	The younger Bullard returned from World War I with a steel military helmet that provided the impetus for developing a sturdier safety helmet more resistant to falling objects and other materials that might strike workers in the head.
http://www.w3.org/ns/prov#wasQuotedFrom	safetyunlimited.com