code: def monitoring_topic_arn(config):
      """Return the ARN of the monitoring SNS topic"""
      return "arn:aws:sns:{region}:{account_id}:{topic}".format(
          region=config["global"]["account"]["region"],
          account_id=config["global"]["account"]["aws_account_id"],
          topic=monitoring_topic_name(config)[0],
      )
  
file_path: streamalert/streamalert_cli/terraform/common.py
imports: from collections import defaultdict
label_desc: Use image node_id 3 for calling a global function with example usage: monitoring_topic_arn(config) and returns: str