3191
But it took federal authorities who regulate medical devices four months to acknowledge only one of the alleged defects , and for the company , St. Jude Medical , to patch it .
 discover vulnerability: acknowledge
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: acknowledge