Capturing output of a workflow from another workflow

I am trying to call a workflow WF1 from another workflow WF2 . I am able to do that and WF1 is getting executed perfectly in the background and returning the desired output through an array of number  . Used logs of WF1 to verify that .

But I want to capture the output (array/integer) of WF1 through WF2 . I am unable to get the output (snapshots) through WF2 .

I am attaching the code and log of WF2 . I am attaching the code and log of WF1 as well.