1875
OBJECTIVE : A randomised , double - blind study to compare the gastrointestinal ( GI ) tolerability , safety and efficacy of etoricoxib and diclofenac in patients with rheumatoid arthritis ( RA ) .
 Chemical: etoricoxib; Chemical: diclofenac; Disease: rheumatoid arthritis; Disease: RA
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: etoricoxib; Chemical: diclofenac; Disease: rheumatoid arthritis; Disease: RA