code: def unsubscribe(topic, subscription_arn, region=None, key=None, keyid=None, profile=None):
      '''
      Unsubscribe a specific SubscriptionArn of a topic.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt myminion boto_sns.unsubscribe my_topic my_subscription_arn region=us-east-1
  
      .. versionadded:: 2016.11.0
      '''
      conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
  
      if subscription_arn.startswith('arn:aws:sns:') is False:
          return False
  
      try:
          conn.unsubscribe(subscription_arn)
          log.info('Unsubscribe %s to %s topic', subscription_arn, topic)
      except Exception as e:
          log.error('Unsubscribe Error', exc_info=True)
          return False
      else:
          __context__.pop(_subscriptions_cache_key(topic), None)
          return Truf unsubscribe(topic, subscription_arn, region=None, key=None, keyid=None, profile=None):
      '''
      Unsubscribe a specific SubscriptionArn of a topic.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt myminion boto_sns.unsubscribe my_topic my_subscription_arn region=us-east-1
  
      .. versionadded:: 2016.11.0
      '''
      conn = _get_conn(region=region, key=key, keyid=keyid, profile=profile)
  
      if subscription_arn.startswith('arn:aws:sns:') is False:
          return False
  
      try:
          conn.unsubscribe(subscription_arn)
          log.info('Unsubscribe %s to %s topic', subscription_arn, topic)
      except Exception as e:
          log.error('Unsubscribe Error', exc_info=True)
          return False
      else:
          __context__.pop(_subscriptions_cache_key(topic), None)
          return True
docs: Unsubscribe a specific SubscriptionArn of a topic.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt myminion boto_sns.unsubscribe my_topic my_subscription_arn region=us-east-1
  
      .. versionadded:: 2016.11.0