{
    "proposals": [
        {
            "join_class": "category",
            "column": "iris.species",
            "kind": "external_candidate",
            "entry_id": null,
            "name": "GBIF Backbone Taxonomy",
            "probable_url": "https://www.gbif.org/dataset/d7dddbf4-2cf0-4f39-9b2a-bb099caae36c",
            "license_expectation": "CC BY 4.0 (to be verified)",
            "join_story": "Prefixing the genus to each species label would let the three species be matched to accepted taxonomic names, ranks and synonyms. Measurements could then be grouped by formal classification rather than by a bare label.",
            "teaches": "Shows whether the species groupings in your measurements line up with how botanists formally classify these flowers."
        },
        {
            "join_class": "category",
            "column": "iris.species",
            "kind": "external_candidate",
            "entry_id": null,
            "name": "USDA PLANTS Database",
            "probable_url": "https://plants.usda.gov/",
            "license_expectation": "US government public domain (to be verified)",
            "join_story": "Matching each species to its record would add native range, growth habit and habitat to the flower measurements. Size differences between species could then be read against where and how each species grows.",
            "teaches": "Shows whether the size differences between your species reflect their natural habitats or are just label noise."
        }
    ]
}