Betfair historical data - hot to distinguish legues?

[piotraspl]

Hi, I downloaded a package of English football historical data for time: 2017-2018. I would like to sort all those files in different catalogues like:

- pemiership
- championship
- league 1

and so one....

I only found general information in JSON file:

"countryCode":"GB",
"eventName":"West Brom U23 v Norwich U23"

but no indication of league name (above is rather easy - U23 ) but other are impossoble :/ I am on BASIC plan - maybe that is a issue?

Any thoughts?