Teach me how to use Scrapebox's custom data grabber

I'm looking for someone that has some Scrapebox knowledge to come up with a way to utilise the "custom data grabber" function.

I want to scrape the "featured snippet" (position 0) results from a list of keywords.

For example when you google; "how to make a cake" you will see wikihow occupying position 0 with a featured snippet (photo attached).

I know how to do this with screaming frog.

I was using the "custom extraction" part of Screaming frog (screenshot attached with code I was using).

Scrapebox has better proxy support and I believe the process would be easier.

Do you think you can help with this?

Cheers

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