3120
One of the largest trading posts on the Dark Web , AlphaBay , has rewarded a researcher for disclosing the existence of a vulnerability which allowed him to steal over 200,000 private messages exchanged between users and sellers .
 discover vulnerability: disclosing
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: disclosing