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The two IL6 mRNA species are generated by alternative polyadenylation at sites separated by a distance of 1 . 2 kilobases .
 GENE: IL6 mRNA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: IL6 mRNA