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": ""}
    -_ subsp.  united states G   [@C Polygonaceae     NIV 1439962  POLYONUM HUMIFUSUM SUBSP CAURIANUM t0 m!   ALASKA 9:h_          b G polygonum  humifusum 4  caryophyllales q2cXv  caurianum i    
{"catalogNumber": "1439962", "order": "Caryophyllales", "family": "Polygonaceae", "scientificName": "Polygonum humifusum subsp. caurianum", "scientificNameAuthorship": "", "genus": "Polygonum", "subgenus": "", "specificEpithet": "humifusum", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "caurianum", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Alaska", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}