CloudFormation で Parameter Store の StringList 型から一部の値を参照する方法を教えてください

名前： /CloudFormation/VPC
種類： StringList
値： sg-1234567890abcdefg,subnet-abcdg1234567890

AWSTemplateFormatVersion: '2010-09-09'
Description: VPC function.
Resources:
  Function:
    Type: AWS::Lambda::Function
    Properties:
      Handler: index.handler
      Role: arn:aws:iam::123456789012:role/lambda-role
      Code:
        S3Bucket: my-bucket
        S3Key: function.zip
      Runtime: nodejs12.x
      Timeout: 5
      TracingConfig:
        Mode: Active
      VpcConfig:
        SecurityGroupIds:
          - sg-1234567890abcdefg   # パラメータから動作参照にしたい
        SubnetIds:
          - subnet-abcdg1234567890  # パラメータから動作参照にしたい

AWSTemplateFormatVersion: '2010-09-09'
Description: VPC function.
Parameters:
  Vpc:
    Type: AWS::SSM::Parameter::Value<List<String>>
    Default: "/CloudFormation/VPC"
Resources:
  Function:
    Type: AWS::Lambda::Function
    Properties:
      Handler: index.handler
      Role: arn:aws:iam::123456789012:role/lambda-role
      Code:
        S3Bucket: my-bucket
        S3Key: function.zip
      Runtime: nodejs12.x
      Timeout: 5
      TracingConfig:
        Mode: Active
      VpcConfig:
        SecurityGroupIds:
          - !Select [ 0, !Ref Vpc]
        SubnetIds:
          - !Select [ 1, !Ref Vpc]

!Select [ 0, !Split [',', '{{resolve:ssm:/CloudFormation/VPC}}']]