{
    "proposals": [
        {
            "join_class": "temporal",
            "column": "players_tournament_man_.year",
            "kind": "external_candidate",
            "entry_id": null,
            "name": "Jeff Sackmann's tennis_atp match results (Tennis Abstract)",
            "probable_url": "https://github.com/JeffSackmann/tennis_atp",
            "license_expectation": "CC BY-NC-SA 4.0 (non-commercial, share-alike; a human should verify)",
            "join_story": "Joining on season year would line each player's tournament history up with the tour's yearly results, such as surface, draw and champions. A player's career arc could then be read against the seasons around it.",
            "teaches": "Whether a player's good and bad years came from their own form or from how the tour changed around them."
        },
        {
            "join_class": "category",
            "column": "players_tournament_man_.tournament",
            "kind": "external_candidate",
            "entry_id": null,
            "name": "Jeff Sackmann's tennis_atp tournament level and surface fields",
            "probable_url": "https://github.com/JeffSackmann/tennis_atp",
            "license_expectation": "CC BY-NC-SA 4.0 (non-commercial, share-alike; a human should verify)",
            "join_story": "Tournament names would gain a tier such as Grand Slam, Masters or smaller events, plus a surface. The round reached could then be compared fairly across events of very different weight.",
            "teaches": "Which results came at the biggest events and which at lesser ones, so a deep run is read in context."
        }
    ]
}