code: def normalize_release_properties(ensembl_release, species):
      
      ensembl_release = check_release_number(ensembl_release)
      if not isinstance(species, Species):
          species = find_species_by_name(species)
      reference_name = species.which_reference(ensembl_release)
      return ensembl_release, species.latin_name, reference_name
docs: Make sure a given release is valid, normalize it to be an integer,
      normalize the species name, and get its associated reference.