17112
The samples were stored ( 4 +/- 1 degrees C ) for 20 days and the sampling was done at 0 , 4 , 8 , 12 , 16 , 20 days .
 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