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": ""}
  R7s: r.r. dreisbach   Potamogeton +   oi 1280865 7278 -A   -83.912726 it;    2SBh% potamogetonaceae 1 mi. N. of Waterworks Park, Bay City  (GDw   gramineus *S  Bay n-       .A(p 43.676761      1931-07-19 Enr  
{"catalogNumber": "1280865", "order": "", "family": "Potamogetonaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Potamogeton", "subgenus": "", "specificEpithet": "gramineus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "R.R. Dreisbach", "recordNumber": "7278", "verbatimEventDate": "1931-07-19", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Bay", "municipality": "", "locality": "1 mi. N. of Waterworks Park, Bay City", "decimalLatitude": "43.676761", "decimalLongitude": "-83.912726", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}