<http://webisa.webdatacommons.org/330832076>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/330832076>	<http://www.w3.org/ns/prov#value>	"Self-test of the system and its sensors is an essential element in achieving the fail-safe characteristics needed for a crossing protection system." .
<http://webisa.webdatacommons.org/330832076>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/443642261>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/330832076> .