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The mirAct web server ( http : / / sysbio . ustc . edu . cn / software / mirAct ) is a tool designed to investigate miRNA activity based on gene - expression data by using the negative regulation relationship between miRNAs and their target genes .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities:  
Answer:
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