Table 1 Feature encoding method for learning task
Feature | Value |
|---|---|
11 location-related features | If geographical locations can be extracted from feature fi, then value of fi is encoded as "Y". Otherwise, value of fi is encoded as "N". |
Event class | "Normal", "Report", "Information", "Hypothetical" |
Subject type | "Disease_Germ" (disease or pathogen) "Symptom" (expression that indicates symptom of any disease) "Official" (a person who has the property of being an official) "Person" (a person who does not have the property of being an official) "Government Organization" "WHO" (World Health Organization) "WHO-related" (WHO agency or UN agency) "Organization" (other kinds of organizations) "Location" "Other" (none of above classes) |