2656
Under anaerobic conditions ( a 50 - day experiment ) these organisms degraded 15 - 18 % of the TEM , 20 - 25 % of some alkanes , and 15 - 18 % of selected polycyclic aromatic hydrocarbons .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
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