<http://webisa.webdatacommons.org/217052896>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.ca> .
<http://webisa.webdatacommons.org/217052896>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/347482490>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/217052896> .
<http://webisa.webdatacommons.org/217052896>	<http://www.w3.org/ns/prov#value>	"Controllers also issue analog control signals for controlling, for example, the speed of fan motors, and incremental control signals such as duration modulated control signals to control the position of dampers." .