Nested lists in yaml

Question

How can I create nested lists in YAML? I want to get:

 {\"Hello\": [\"as\", [\"http://\", [\"cat\"]]]}

Here\'s my YAML that doesn\'t work (

Answer 1

And the answer is:

URL:
  Description: URL of the website
  Value:
    "Fn::Join":
      - ""
      - - "http://"
        - "Fn::GetAtt":
            - ElasticLoadBalancer
            - DNSName

(see http://pyyaml.org/wiki/PyYAMLDocumentation#YAMLsyntax - "block sequences can be nested")