Updated IDs to use an IRI and fix to relations

Harmonizing this example with a few decisions made when working on spm_results.provn 

* update all IDs to be in the `niiri` namespace
* include an `_id` suffix on IDs just to be clear these are not types
* updated initial `used` relation to be `wasDerivedFrom`
* updated `wasAttributedTo` to be `wasAssociatedWith`