AWSTemplateFormatVersion: "2010-09-09"  
Resources:  
  WebInstance:
    Type: AWS::EC2::Instance
    Properties:
      InstanceType: t2.nano
      ImageId: ami-80861296
      KeyName: act3-key
      SecurityGroupIds: [ !ImportValue SCDemoSG ]
      SubnetId: !Select [ 0, !Split [ ",", !ImportValue SCDemoPublicSubnet ] ]