I noticed that the check for "real" elements sometimes gives back false positives, e.g., when the labels are CO or P6 ase sets the species label as C and P
see e.g., https://nomad-lab.eu/prod/v1/staging/gui/user/uploads/upload/id/GCSY0NgNQHKVT2mSk20Urw/entry/id/z8Yfp_befo-QIJbrKwN_16qs6KfN