About: http://webisa.webdatacommons.org/100501693

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	This makes it is quite clear in my reading that your existing shield bonus (+0 if you do not have one) is increased by one, allowing it to stack with your existing shield or other shield bonus.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com