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“ Thankfully , WhatsApp and Telegram responded quickly and responsibly to deploy the mitigation against exploitation of this issue in all web clients , ” Check Point Head of Product Vulnerability Oded Vanunu said .
 discover vulnerability: responded quickly
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: responded quickly