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The phishing scheme -- which may have circulated to 1 million Gmail users -- is particularly effective because it fooled users with a dummy app that looked like Google Docs .
 phishing: have circulated
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:
 phishing: have circulated