List picker - 2 lists - select and display both selections

MIT App Inventor Help
1

Essentially the user taps a button and a list populates, once user makes selection a second list appears and after the 2nd selection the output of both items are now shown as text on that button.

Ex.
-Tap Listpicker1
-Listpicker1 with Globalnames1 shows up and user scrolls to make selection
-User selects Wood (item on list)
-Listpicker1 with Globalnames1 shows up and user scrolls to make selection
-User selects Fire (item on list)
-After 2nd selection is made button now shows Wood Fire

I got the first selection to show, but I cant find anything online on how to set multiple selections.

Any assistance is GREATLY appreciated.

2

Study this Fruit Stand app
https://groups.google.com/forum/#!msg/mitappinventortest/NF6j--NJc-E/hPfG8JDwFQAJ

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