About: http://webisa.webdatacommons.org/192921619

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 earliest and simplest iron sights are fixed and cannot be easily adjusted for variables such as target distance, the effect of wind, or variations between different cartridges.
http://www.w3.org/ns/prov#wasQuotedFrom	fairfaxcrew.com