AWSTemplateFormatVersion: '2010-09-09'
Resources:
  Subnet:
    Properties:
      AvailabilityZoneId: use1-az1
      AvailabilityZone:
        Fn::Select:
          - 0
          - Fn::GetAZs: ""
      CidrBlock: 10.0.0.0/20
      VpcId: vpc-abc12345
    Type: "AWS::EC2::Subnet"
