28404
Given the increasing use of the newer agents , focused research is needed to identify effective reversal strategies and develop and implement an accurate method ( assay ) to guide reversal of the newer agents .
 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