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To address the uncertainties associated with the risks of ULV applications and the contradictory findings of other ecological risk assessments , the authors performed a probabilistic aquatic ecological risk assessment for permethrin using actual environmental deposition on surfaces to estimate permethrin concentrations in water .
 Chemical: permethrin; Chemical: permethrin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: permethrin, permethrin 
Answer:
 Chemical: permethrin; Chemical: permethrin