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Silymarin treatment was associated with rapid repair of UVB - induced cyclobutane pyrimidine dimers ( CPDs ) in DCs and silymarin treatment did not prevent UV - induced immunosuppression in XPA - deficient mice which are unable to repair UV - induced DNA damage .
 Chemical: cyclobutane pyrimidine dimers; Chemical: CPDs
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cyclobutane pyrimidine dimers; Chemical: CPDs