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": ""}
    x  rk 2007-06-21     wF#6 DICHANTHEIUM shady, ory, weedy, sandy with white oak trees. B     MICHIGAN 1ejTA     + UNITED STATES         8oOPY 43.503631  .i3$, (Schult.) Gould   NTzk. -86.049592 
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "(Schult.) Gould", "genus": "Dichanthelium", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "2007-06-21", "habitat": "Shady, dry, weedy, sandy with White Oak trees.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "43.503631", "decimalLongitude": "-86.049592", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}