11243
In addition , Mn ( 2 + ) induced both the formation and accumulation of DNA single strand breaks ( via alkaline comet assay analysis ) and oxidatively modified thymine bases ( via gas chromatography / mass spectrometry analysis ) .
 Chemical: Mn ( 2 + ); 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: Mn ( 2 + ), thymine 
Answer:
 Chemical: Mn ( 2 + ); Chemical: thymine