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In total , the researchers uncovered four instances of critical pre-authentication shell injection flaws in Libelium 's wireless sensor network , Meshlium .
 the researchers: discoverer; critical pre-authentication shell injection flaws: vulnerability; wireless sensor network: vulnerable system; Libelium: vulnerable system owner
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 researchers: discoverer; critical pre-authentication shell injection flaws: vulnerability; wireless sensor network: vulnerable system; Libelium: vulnerable system owner