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We report one case of non-Hodgkin lymphoma in a patient, with a 30-year history of rheumatoid arthritis, taking low dose methotrexate weekly over a 10-month period.
 adverse event: taking 
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: taking 