<http://webisa.webdatacommons.org/prov/41218554> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/370880390> . <http://webisa.webdatacommons.org/370880390> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/370880390> <http://www.w3.org/ns/prov#value> "wherein when the corresponding data for a selected location estimating method (LEM) of the first and second location estimating methods is provided, at least in part, by an instance of (c) hereinabove, there is a two-way communication between the mobile unit MU and at least one of the communication stations in order to provide the corresponding data to the location estimating method LEM:" . <http://webisa.webdatacommons.org/370880390> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.ca> .