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": ""}
  1891-8-31 #C  Huron River, Ann Arbor     -83.7426 ;oOBu  Potamogeton zosteriformis v|&   =ce ALISMATALES    v bv  W.H. RUSH 42.29559 mE  Fernald -    w ZOSTERIFORMIS  United States fk     `!6 Botamogetonaceae   EmDn michigan   q POTAOGETON   n0;G Washtenaw  PFA9i 1281994   
{"catalogNumber": "1281994", "order": "Alismatales", "family": "Potamogetonaceae", "scientificName": "Potamogeton zosteriformis", "scientificNameAuthorship": "Fernald", "genus": "Potamogeton", "subgenus": "", "specificEpithet": "zosteriformis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "W.H. Rush", "recordNumber": "", "verbatimEventDate": "1891-08-31", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Washtenaw", "municipality": "", "locality": "Huron River, Ann Arbor", "decimalLatitude": "42.29559", "decimalLongitude": "-83.7426", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}