1350
METHODS : We conducted a retrospective cohort study using administrative data of patients > or = 65 years of age who filled a prescription for NSAID or acetaminophen during 1999 - 2002 .
 Chemical: acetaminophen
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: acetaminophen