In the ultrasound equipment category, most thought leadership would focus on development of new technologies, such as portability in ultrasound devices.

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Adultery and desertion had never been thought to fall into that category.

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Panera: One might have thought there was no room left in the fast food category, let alone new thoughts to think about the category, that is until Panera came along.

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In this category, I would put business, governmental and thought leaders.

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The future of the category B prison had been under review with its conversion thought to be one of the favoured options.

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One might have thought that there was no innovative thinking to be had in the food category in general, a pretty slow-growth arena.

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However, one-in-five of the people (22%) who took part in the poll also thought the transatlantic couple were the most mismatched, although the top award in this category went to media millionaire Chris Evans and his teenage bride, pop singer, Billie Piper.

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Besides bringing new species to the textbooks - and relegating them immediately to the "extinct" category - the study sheds new light on the extinction event, widely thought to have been caused by an enormous asteroid impact at the end of the Cretaceous period, about 65.5 million years ago.

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