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": ""}
NORTHWEST TERRITORIES +D          HANSFORD T. SHACKLETTE ,   USw,! 1439755     l  subsp.  Polygonum aviclare subsp. buxiforme xYN    vv$ Contact UM Herbarium     ? (small) costea & tardif  4h cy POLYGONACEAE  =uH AVICULARE  G`&<n 3126  uB_^P CANADA 
{"catalogNumber": "1439755", "order": "", "family": "Polygonaceae", "scientificName": "Polygonum aviculare subsp. buxiforme", "scientificNameAuthorship": "(Small) Costea & Tardif", "genus": "", "subgenus": "", "specificEpithet": "aviculare", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Hansford T. Shacklette", "recordNumber": "3126", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Northwest Territories", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}