22097
For the key contrast of ratio : ' border : non - border notifications ' , variations between 7 % : 89 % were observed for the average monthly contributions and , import tonnage per border notification revealed up to 129 - fold differences between MS .
 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