Facebook has announced its new "Graph Search" at its headquarters in San Francisco, California.
Its chief executive Mark Zuckerberg said the company's mission "is to make the world more open and connected", Engadget website reports.
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Thousands are protesting in Barcelona to demand the release of two Catalan pro-independence activists jailed by Spanish authorities.
The mogul has reportedly agreed to permanently leave the company he co-founded after a flood of sex abuse complaints.
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