15048
Improving our understanding of their decay mechanisms and developing strategies to control or eliminate cluster instability is a priority , to develop a more complete theory of their stability , to avoid studying mixtures of clusters produced by the decay of purified materials , and to enable technology development .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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