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<http://webisa.webdatacommons.org/prov/248912083>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/308390691> .
<http://webisa.webdatacommons.org/308390691>	<http://www.w3.org/ns/prov#value>	"If it is desired to open the blind slats, then the control shaft 64 is rotated by any suitable means (not shown) such as a wand or a gear and chain system such as is well known in the art, or in some cases a motor." .
<http://webisa.webdatacommons.org/308390691>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .