979
Bitcoin Knots , one of at least 96 bitcoin forks to date , was considered vulnerable as well and its client software was patched .
 patch vulnerability: was patched
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:
 patch vulnerability: was patched