2827
However , the issue was renewed last week when researchers from Ruhr - University Bochum in Germany published a paper on different attacks against network printers and an assessment of 20 printer models .
 discover vulnerability: published a paper
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: published a paper