Shortly before the opening last month, the Leopold Museum said that it had received so many complaints that it had been forced to take action.

上个月，也就是在看展前几天，列奥波多博物馆接到了太多的投诉，因此他们不得不对广告做出改动。

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"We weren't prepared enough, but the bottom line is we're in a race right now and we desperately needed those points, " Leopold said.

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"We can obtain real-life data to train our algorithms in large amounts that would practically be impossible to get in any other way, " said Leopold Summerer, head of the Esa lab that developed the app.

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But Nokia could have difficulties poaching people from Apple and Google, said Jeff Leopold, a managing director at executive-search firm Cook Associates Inc. in Boston, because it doesn't carry the same status in Silicon Valley.

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