2469
What ’s more , Bambenek explained that this issue did n’t occur just once or twice , and on multiple occasions Fidelis observed phone numbers associated with telemarketing scammers signed up to use Telegram .
 discover vulnerability: observed
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: observed