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": ""}
 william b. drew U+   Digit4ria ischaemum mg    < -85.6j4255 43.51863 f d  Michi:gan TYZ     tlMg Anton A. Reznicek   V/([R "abumdant..., forming flat mats." Newaygo       t Big Prairie Desert   UniJted States `4-;    Q 1482256 in sand FSZT    H Poales 1947-09-20 f mjL  M292 |w-     h ISCHAEMUM  
{"catalogNumber": "1482256", "order": "Poales", "family": "", "scientificName": "Digitaria ischaemum", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "ischaemum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Anton A. Reznicek", "recordedBy": "William B. Drew", "recordNumber": "M292", "verbatimEventDate": "1947-09-20", "habitat": "in sand", "occurrenceRemarks": "\"abundant..., forming flat mats.\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Newaygo", "municipality": "", "locality": "Big Prairie Desert", "decimalLatitude": "43.51863", "decimalLongitude": "-85.64255", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}