def METHOD_NAME(self, subject_id, entity_id):
    """Returns the status of assertions from a specific entity_id.
    :param subject_id: The ID of the subject
    :param entity_id: The entity ID of the entity_id of the assertion
    :return: True or False depending on if the assertion is still
        valid or not.
    """
    item = self._cache.find_one({"subject_id": subject_id, "entity_id": entity_id})
    try:
        return time_util.not_on_or_after(item["timestamp"])
    except TooOld:
        return False