SharedDimension Export (.trig) is missing data behind blank nodes

[Rdataflow]

Describe the bug
SharedDimension Export (.trig) is missing data behind blank nodes, those are attached at sh:property and schema:additionalProperty and are expected to be part of the export.

• query showing the properties https://s.zazuko.com/3tqiw77 omitted in the .trig file.

Affected functionalities (all that apply)

• CSV Mapping
• Transformation
• Publishing
• Other: SharedDimension

To Reproduce
Steps to reproduce the behavior:

1. Go to CC Test > Shared Dimension > Zolltarif Tim Test v2 or directly open https://test.cube-creator.lindas.admin.ch/app/shared-dimensions/dimension!!zolltarif_test_tim_v2
2. Click on Download
3. open trig file
4. See missing data compared to https://s.zazuko.com/3tqiw77

Expected behavior

• a trig file containing proper implicit blank nodes - thus giving the ability to reimport and generate different blank nodes avoiding any collision

@CDiGallo @timvonfelten