<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _CreateEventTag(self, event, comment, labels):
 """Creates an event tag. Args: event (EventObject):
 event to tag. comment (str):
 event tag comment. labels (list[str]):
 event tag labels. Returns: EventTag: the event tag. """

    event_identifier = event.GetIdentifier()

    event_tag = events.EventTag(comment=comment)
    event_tag.SetEventIdentifier(event_identifier)
    event_tag.AddLabels(labels)

    event_identifier_string = event_identifier.CopyToString()
    logger.debug('Created event tag: {0:s} for event: {1:s}'.format(
        comment, event_identifier_string))

    return event_tag