Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
1503862 %   1860-06-06 n  lupulina n7  E.E. Baldwin       FP medicago lupulina    Ohi0 $ /    xyu Fabaceae UNITED STATES ~4^  l.C HjGrV   `F old fort miami, maumee  1YM MEDICAGO  So s.n.  NK~   ?fabales        r GLACIS  M O Z Lucas  
{"catalogNumber": "1503862", "order": "Fabales", "family": "Fabaceae", "scientificName": "Medicago lupulina", "scientificNameAuthorship": "L.", "genus": "Medicago", "subgenus": "", "specificEpithet": "lupulina", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "E.E. Baldwin", "recordNumber": "s.n.", "verbatimEventDate": "1860-06-06", "habitat": "Glacis", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Ohio", "county": "Lucas", "municipality": "", "locality": "Old Fort Miami, Maumee", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}