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": ""}
  United States -  pontederiaceae $L`E   G@ COMMELINALES  q_nG edward g. voss DUBIA ?f 0  350 L*UM  l.a. woodbury & c.m. tarzwell $6    oB HETERANTHERA DUBIA  k  michigan   R5@3 1936-08-20      (jacq.) macmill. lGh  43.23244 U>      |t muskegon -86.29174 u   ~ heteranthera
{"catalogNumber": "", "order": "Commelinales", "family": "Pontederiaceae", "scientificName": "Heteranthera dubia", "scientificNameAuthorship": "(Jacq.) MacMill.", "genus": "Heteranthera", "subgenus": "", "specificEpithet": "dubia", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "L.A. Woodbury & C.M. Tarzwell", "recordNumber": "350", "verbatimEventDate": "1936-08-20", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Muskegon", "municipality": "", "locality": "", "decimalLatitude": "43.23244", "decimalLongitude": "-86.29174", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}