Investigate lack of causal predicates in omim_gene_to_disease

[kevinschaper]

The only predicates that we're currently producing in the OMIM g2d ingest are biolink:gene_associated_with_condition and biolink:risk_affected_by - but we expect to have biolink:causes also.

[sabrinatoro]

I don't think we would expect "causes", as we had discussions about the fact that a gene does not cause a disease, and therefore we don't want to use this relation. So I think the current predicates are ok.

[kevinschaper]

Thanks @sabrinatoro!