S_ALR_87012284 - Which field ?

Hi,

I am trying to recreate the report S_ALR_87012284 in a Bex Query, however I am struggling to find where a specific field is coming from.

When I execute the report S_ALR_87012284 in SAP, it displays 'item' and then text for the item which seems to be a concatenation of the Fincl Statement Item key and text. How can I identify where the 'item' field is coming from ?

I am using Inforprovider 0FIGL_V10, to recreate the report  and its a very simple query at the moment, just Fincl Statement Itema and Balance Sheet Value, I just cant find the 'item' field

I only have access to ECC Production ( ! ) at the moment, and trying  to modify the financial statement item gives an 'error 400, can not modify' type error. Is there any other way to identify where the 'item' field is coming from ?

Thanks