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The main suspect in the latest so-called Islamic State video is thought to be British man, Siddartha Dhar. He's a Muslim convert from east London. Junior doctors in England are to go on strike over a contract dispute, after failing to reach agreement with the government. All the latest entertainment news in Back Row. And our Midnight Expert is Dr Eric Horvitz, the Managing Director of Research at Microsoft's main lab in the States. He takes your questions on anything to do with artificial intelligence.