2347
By comparing the predicted calculations with the experimentally observed effects , we concluded that CA accurately predicts the combination of amphetamines , which act together to generate additive effects over a large range of concentrations .
 Chemical: amphetamines
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: amphetamines