<http://webisa.webdatacommons.org/223042026>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/472759302>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/223042026> .
<http://webisa.webdatacommons.org/223042026>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/223042026>	<http://www.w3.org/ns/prov#value>	"are observed such tendencies as shown in (a) to (d) below: (a) When the ratio of the duration of reverse current flow to the duration of regular" .