So to find out more, scientists Mr Brian Davis, Dr Gang Li and Professor William Murphy conducted an analysis of the DNA of all these species.

为了找出一个答案，科学家布莱恩戴维斯，李刚博士以及威廉姆艾菲教授对这些品种的DNA进行了分析。

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Obama singled out Brian Murphy, the first to arrive, who, he said, suffered 12 bullet wounds.

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Associated Press writer Brian Murphy contributed to this report from Dubai, United Arab Emirates.

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