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Arrange the following sentences to form a coherent paragraph:

1. The study suggests that the disease did not spread with such intensity, but that it may have driven human migrations across Europe and Asia.
2. The oldest sample came from an individual who lived in southeast Russia about $5,000$ years ago.
3. The ages of the skeletons correspond to a time of mass exodus from today's Russia and Ukraine into Western Europe and central Asia, suggesting that a pandemic could have driven these migrations.
4. In the analysis of fragments of DNA from $101$ Bronze Age skeletons for sequences from Yersinia pestis, the bacterium that causes the disease, seven tested positive.
5. DNA from Bronze Age human skeletons indicate that the black plague could have emerged as early as $3,000$ BCE, long before the epidemic that swept through Europe in the mid-$1300$s.
1. $51432$
2. $12543$
3. $54123$
4. $32415$