12819
A generally accepted and validated laboratory model for smoking - associated pulmonary tumorigenesis would be useful for both basic and applied research applications , such as the development of early diagnostic endpoints or the evaluation of modified risk tobacco products , respectively .
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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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