Removes the factuality for the given factuality identifier
        @type factuality_id: string
        @param factuality_id: the factuality identifier to be removed

def remove_this_factuality(self,factuality_id):
        """
        Removes the factuality for the given factuality identifier
        @type factuality_id: string
        @param factuality_id: the factuality identifier to be removed
        """
        for fact in self.get_factualities():
            if fact.get_id() == factuality_id:
                self.node.remove(fact.get_node())
                break