3131
Although there was little PFOS residue in embryos derived from the 1 - to 20 - dpf parental PFOS - exposed group , the adverse behavioral effects on both adult and F1 larvae indicate that exposure during the first 21 dpf induces long - term neurobehaviorial toxicity .
 Chemical: PFOS; Chemical: PFOS
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: PFOS; Chemical: PFOS