20225
The agreement of the predicted and observed activity values of the test set ( measured by , say , R ( 2 ) ) is an estimate of the self - consistency of the model and is sometimes taken as an indication of the predictivity of the model .
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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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