19051
Because of the limited database it was decided not to derive specific WHO - UNEP TEFs for fish , but for ecotoxicological risk assessment the use of specific relative effect potencies ( REPs ) from fish embryo assays is recommended .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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