```json { "proposals": [ { "join_class": "temporal", "column": "ae.AEDTC", "kind": "external_candidate", "entry_id": null, "name": "FDA Drug Approval Dates", "probable_url": "https://www.fda.gov/drugs/drug-approvals-and-databases/drugsfda-data-files", "license_expectation": "Public Domain (US Government)", "join_story": "Joining adverse event dates to FDA approval timelines would reveal whether events cluster in early post-approval periods versus mature drug lifecycles, helping distinguish launch-phase surveillance signals from long-term safety patterns.", "teaches": "Whether your adverse events concentrate in newly approved drugs or established therapies, informing risk monitoring priorities." }, { "join_class": "category", "column": "ae.AEACN", "kind": "external_candidate", "entry_id": null, "name": "MedDRA Hierarchy Reference", "probable_url": "https://www.meddra.org/how-to-use/support-documentation/english", "license_expectation": "Restricted - requires subscription", "join_story": null, "teaches": null } ] } ``` Wait, I need to reconsider. MedDRA requires subscription access, which violates the "public, credential-free" requirement. Let me revise: ```json { "proposals": [ { "join_class": "temporal", "column": "ae.AEDTC", "kind": "external_candidate", "entry_id": null, "name": "FDA Drug Approval Dates", "probable_url": "https://www.fda.gov/drugs/drug-approvals-and-databases/drugsfda-data-files", "license_expectation": "Public Domain (US Government)", "join_story": "Joining adverse event dates to FDA approval timelines would reveal whether events cluster in early post-approval periods versus mature drug lifecycles, helping distinguish launch-phase surveillance signals from long-term safety patterns.", "teaches": "Whether your adverse events concentrate in newly approved drugs or established therapies, informing risk monitoring priorities." } ] } ```