<http://webisa.webdatacommons.org/prov/391416512>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/411029348> .
<http://webisa.webdatacommons.org/411029348>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/385915384>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/411029348> .
<http://webisa.webdatacommons.org/411029348>	<http://www.w3.org/ns/prov#value>	"Push buttons, limit switches, and photoelectric sensors are examples of devices providing a discrete signal." .
<http://webisa.webdatacommons.org/prov/387773306>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/411029348> .
<http://webisa.webdatacommons.org/411029348>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<plcprogrammers.co.uk> .