Download item firebase

I have in my firebase:
-ap
btn_1: “[[” 789396523648 \ ", " BCAA \ ", " 52 \ ", " ffff \ ", " fff \ ", " Am …

how should I assemble the blocks to receive a label on the item: BCAA?
Could you describe me the blocks?

This seems to be a list.Use this block:
image

  • Get value and set list to ’ value ’
  • Set index to 2 or which data you want to get
    If this does not works then show how you are storing data.

How do I put a picture here?

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firebase: -api
btn_1: “[[” 7898483537716 \ ", " Luteins \ ", " 25 \ ", " \ ", " \ ", " Aminoacids …
Could someone help me here?
I want to create a Search button, which will be typed a barcode: 7898 … This will search my firebase to which it is thus filed as above. Being found the barcode inside the tag: btn_1, so I want a text box: Product, it appears written “Luteinas”.
I ask your kindness to post me the packing of the blocks.