13048
In the experiment , between 30 to 40 percent of the muscle fibers in one group of mice produced dystrophin for two weeks before diminishing .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities:  
Answer:
 None