Help: How to pass workflow output variables to chatflow?

I called Workflow A in my chatflow. Workflow A’s purpose is to call an API to import data. In Workflow A, I outputted three variables: json, file, and str. I want to pass these three variables to the chatflow so I can determine if Workflow A executed successfully, but I’ve been trying for an hour or so without success. The screenshot shows the output of my Workflow A. I hope to get some help.