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A patient with a large hydatid cyst of the left lobe of the liver developed metabolic acidosis following rather liberal use of cetrimide-chlorhexidine solution as a scolicidal agent.
 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 