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Last week , British Airways revealed that almost 200,000 further passengers may have had their personal data stolen by hackers in the September attack in what experts described as one of the biggest breaches of consumer data the UK had ever seen .
 data breach: stolen
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:
 data breach: stolen