The regulator says this exceptional step was taken only when vb.ly did not respond to inquiries (vb.ly denies this).

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On behalf of the Welsh Liberal Democrats, Peter Black AM said that they had only asked the assembly to overturn the disqualification because this was an exceptional case.

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"You only do an acquisition of this size and scale if you find an exceptional company, which Tumblr is, " Ms. Mayer said Monday.

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