13609
The similarities in the OH - PBDE congener profile and the ratio of OH - PBDEs to total PBDEs between the two fish species indicated that the hydroxylation of PBDEs might not be species - specific .
 Chemical: OH - PBDE; Chemical: OH - PBDEs; Chemical: PBDEs; Chemical: PBDEs
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: OH - PBDE; Chemical: OH - PBDEs; Chemical: PBDEs; Chemical: PBDEs