code: public boolean isPostDeathEvent(final Attribute event) {
          if ("Burial".equals(event.getString())) {
              return true;
          }
          if ("Cremation".equals(event.getString())) {
              return true;
          }
          if ("Funeral".equals(event.getString())) {
              return true;
          }
          return "Headstone unveiling".equals(event.getString());
      }
docs: <p>Check for post death events, burial, cremation, funeral, head
  stone unveiling come to mind.</p>
  <p>Only public for testability.</p>
  
  @param event the attribute to check if it's a post death event
  @return true if this is a death event