15266
Under this perspective , it has been found that usually there is not one but several disease - causing genes and , therefore , not one but several relevant protein targets to be hit , which do not work on isolation but in a highly interconnected manner , and that most known drugs are inherently promiscuous .
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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:
 None