Alibaba Group Holding Ltd. has invested $215 million in Silicon Valley startup TangoMe Inc. But what exactly is Tango and why is the Chinese e-commerce giant showing so much interest in their product?... more 
Alibaba Group Holding Ltd. has invested $215 million in Silicon Valley startup TangoMe Inc. But what exactly is Tango and why is the Chinese e-commerce giant showing so much interest in their product? WSJ's Doug MacMillan talks to Tango co-founder Eric Setton to find out. less 
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