Assuming there is one bone for each sample, and all bones are from harp seals, I add extra columns:
| New Column Name | Source Column |
|---|---|
| abundance | 1 |
| taxon_id | 1 |
The first join join fills the abundance_element_id column of this entity with the appropriate numbers for each bone from the system_id row of the Entity abundance_element sheet. The second join links the various taxa information to the abundances
