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For more information, see Building the sampleMashup Samples.
Running the client
Before using the geocode service, register for a Yahoo API Key and use it to provision the service (write-once only). For more information, go to http://developer.yahoo.com/wsregapp/index.php
For sample purposes (though it kind of defeats the exercise) you can use ours: rPJmz.HV34Hn654ySbBEOJf2i4nuae6LqGKX5EmrN30Q9aTeabb3vwThv2jRDN.rf3aAIw--