How can we access a property or pipeline variable as a string?

[Sekhar-jami]

I am trying to get the s3 uri of the trained model from the trainingstep in a sagemaker pipeline execution.
I can see that the uri is stored in step_train.properties.ModelArtifacts.S3ModelArtifacts (which is a sagemaker.workflow.properties.Properties object) but am unable to retrieve it as a string. Using the to_string() function returns a Join object which sagemaker converts to a string at runtime, but I need to be able to access it after the pipeline execution is completed as well.
Is there any way to achieve the above?