18635
Significant induction in DNA damage measured by the Comet assay was noticed after B [ a ] P treatment at all concentrations but values returned to the control level after recovery .
 Chemical: B [ a ] P
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: B [ a ] P