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Denial - of - Service ( DoS ) , 51 % Attacks The Bitcoin Core client software is used by BTC miners to validate transactions on the cryptocurrency ’s blockchain and the recent vulnerability found in its source code could have been used to intentionally crash bitcoin ’s full - node operators .
 the recent vulnerability: vulnerability
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 the recent vulnerability: vulnerability