<http://webisa.webdatacommons.org/prov/271516001>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/223052483> .
<http://webisa.webdatacommons.org/223052483>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/223052483>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<sayedsaad.com> .
<http://webisa.webdatacommons.org/223052483>	<http://www.w3.org/ns/prov#value>	"1- 1 Master element is the initiating device, such as a control switch, voltage relay, float switch etc., that serves either irectly, or through such permissive devices as protective and time-delay relays, to place an equipment" .