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": ""}
  2015-08-21  d   A MOSTLY SHADED MATURE CA. QUERCUS FOREST. IN DRY SANDY LOAM        *V* purpurascens 583 o    ;Jx  MICIGAN   o8<  42.59301  several loo~se clumps. mature culms tan and lax. understory mostly prunus pensylvanica, quercus sp. and sassafras albidm saplings with some medium sized pinus strobus. one side of leaves somewhat glossy. s>l      SCPHIZACHNE ,3       
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Schizachne", "subgenus": "", "specificEpithet": "purpurascens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "583", "verbatimEventDate": "2015-08-21", "habitat": "mostly shaded mature ca. Quercus forest. In dry sandy loam", "occurrenceRemarks": "several loose clumps. Mature culms tan and lax. Understory mostly Prunus pensylvanica, Quercus sp. And Sassafras albidum saplings with some medium sized Pinus strobus. One side of leaves somewhat glossy.", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "42.59301", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}