462
After seven months' continuous treatment for suspected tuberculosis with rifampicin and ethambutol a nine-year-old boy developed polyarthritis, rash and hepatitis in association with anti-native DNA antibodies and positive antinuclear factor.
 adverse event: developed 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: developed 