IEvent: "http://adlnet.gov/expapi/verbs/experienced" | "http://adlnet.gov/expapi/verbs/attended" | "http://adlnet.gov/expapi/verbs/attempted" | "http://adlnet.gov/expapi/verbs/completed" | "http://adlnet.gov/expapi/verbs/passed" | "http://adlnet.gov/expapi/verbs/failed" | "http://adlnet.gov/expapi/verbs/answered" | "http://adlnet.gov/expapi/verbs/interacted" | "http://adlnet.gov/expapi/verbs/imported" | "http://adlnet.gov/expapi/verbs/created" | "http://adlnet.gov/expapi/verbs/shared" | "http://adlnet.gov/expapi/verbs/voided" | "http://activitystrea.ms/schema/1.0/consume" | "http://adlnet.gov/expapi/verbs/mastered"