<http://webisa.webdatacommons.org/prov/32931763>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/368357757> .
<http://webisa.webdatacommons.org/368357757>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.co.uk> .
<http://webisa.webdatacommons.org/368357757>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/368357757>	<http://www.w3.org/ns/prov#value>	"The receiver 20 is effective to receive the electrical signal and provide an output which is coupled to suitable indicating means which may be visual such as a display or other means of temporarily or permanently recording the electrical signal generated by the echo." .