Sometimes you don't need a whole webpage of answers to an online search. Instead, you want a simple, short answer to a simple, short question, like, "what's the capital of North Dakota?" Google has been buffing up its ability to respond to such simple questions, and they're touting the technique as ideal for smartphone users. Especially if you've got an iPhone or Android phone, where you can speak the question into the microphone, instead of typing it in.
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