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Google Project Zero whizkid and Tamagotchi whisperer Natalie Silvanovich discovered and reported the flaw , a memory heap overflow issue , directly to WhatsApp in August .
 discover vulnerability: discovered and reported
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: discovered and reported