How to share LDB dataset (index)?

I have LDB dataset.
1. how can I share my LDB dataset (index) with someone (who has access to the storage)?
2. can I prepare part/slice of dataset (e.g., using `--query`) and share it?

Case example:
* I have some storage
* I created LDB dataset
* but not all data were used: I need just 100 data items:
```bash
ldb instantiate --format infer --tag train --target ./train --limit 100
```
* the I want to share my 100-items subset with someone