16592
We developed a model for hole migration along relatively short DNA hairpins with fewer that seven adenine ( A ) : thymine ( T ) base pairs .
 Chemical: adenine; Chemical: thymine
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: adenine, thymine 
Answer:
 Chemical: adenine; Chemical: thymine