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C57 BL / 6 mice were divided into four groups , GGA - treated ( 500 mg / kg / mouse ) and UVB - exposed ( 400 mJ / cm2 ) , GGA - untreated UVB - exposed ( 400 mJ / cm2 ) , GGA - treated ( 500 mg / kg / mouse ) but not exposed and naive controls .
 Chemical: GGA; Chemical: GGA; Chemical: GGA
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: GGA; Chemical: GGA; Chemical: GGA