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  "source_urls": [
    "https://vt.cropsci.illinois.edu/wp-content/uploads/2025/11/Region-3-CornTable-2025.xlsx",
    "https://vt.cropsci.illinois.edu/corn/"
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  "tos_note": "No usage terms posted on UIUC VT site; publicly-funded land-grant data; attribute University of Illinois Variety Testing.",
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