809
Recently, some studies have also reported association between patients with juvenile rheumatoid arthritis (JRA) treated with Methotrexate (MTX) and malignant lymphoma developing.
 adverse event: association 
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: association 