About: http://webisa.webdatacommons.org/376080383

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 mechanisms which move the launcher and propel the projectile must consist of elastic material such as springs, rubber bands, bungee cord, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	csbsju.edu