Load data as a dict not a tuple

[jaagut]

Proposed changes

Related issues

Necessary checks

• [ ] Update poetry package version semantically
• [ ] Write documentation
• [ ] Create issues for future work
• [ ] Test on your machine

[jaagut]

@Flova What is the purpose and status of this PR? How to progress further?

[Flova]

I don't really know if I want to proceed with this PR. It was intended to unify the transformation pipeline with the upstream repo iirc.