some item: a source, eh
another item: another source, eh
one more item: another source, eh
conversion 1 => value 1
conversion 2 => value 2
conversion 3 => value 3
conversion 4 => value 4
conversion 5 => value 5
Such an approach is worth doing if your data structure has a consistent structure and you need to perform a bunch of queries against it. If the data is not consistently structured then it's going to be endless hard work no matter what because you simply have to deal with special cases and that is always a source of pain.
Note that I fixed a bunch of syntax errors in the structure you gave so I presume that your sample doesn't map on to anything real in any sense.