13500
The mtk - QSBER model was created by using linear discriminant analysis ( LDA ) for the classification of compounds as positive ( high biological activity and / or low toxicity ) or negative ( otherwise ) under many experimental conditions .
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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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