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Boelter later told The Guardian the “ backdoor ” gave WhatsApp the ability to read messages because of the way the company had implemented its end - to - end encryption protocol .
 gave WhatsApp the ability to read messages: capabilities; the “ backdoor ”: vulnerability; Boelter: discoverer
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:
 gave WhatsApp the ability to read messages: capabilities; the “ backdoor ”: vulnerability; Boelter: discoverer