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It is thought that the clinico-pathological features and chronology of this case bore the hallmarks of the so-called "3-week sulphasalazine syndrome", a rare, but often fatal, immunoallergic reaction to sulphasalazine.
 adverse event: immunoallergic reaction 
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: immunoallergic reaction 