Use YAD/Zenity dialogues to populated variables in a bash script?

I am learning some bash scripting.

I am interested to learn about getting input for my scripts via a GUI interface. It seems that yad (forked from zenity) is the most robust tool for this. (But if there is a better choice I would like to hear about it too.)

Is it possible to obtain 2 or more named variables using yad? Not just getting the values based on their positions ($1, $2, etc), with awk. See "What doesn't work" spoiler for those.

For a simple example, I want to ask the user for a file name and some content. Creating the dialogue is like this:

 sh

    
yad --title "Create a file" --form --field="File name" --field="Content"

  

If you fill both fields the output in the terminal is file|this is some text|. How do I get them into variables like $filename and $filecontent? So then I can finish the script like this:

 sh

    
touch "$filename"
echo "$filecontent" > $filename

  

Is this possible??? I do not find it anywhere. I looked though all kinds of websites like YAD Guide, yad man page, smokey01. Maybe I missed something. On yaddemo I read about bash arrays and it seemed to come close but I couldn't quite piece it together.