22032
The study included 98 children aged 80 days to 19 years ( median 53 . 1 months ) , 25 were below the age of 2 years .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None