1358
Among users of aspirin , both celecoxib and naproxen seemed to be the least toxic .
 Chemical: aspirin; Chemical: celecoxib; Chemical: naproxen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: aspirin; Chemical: celecoxib; Chemical: naproxen