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": ""}
   1316819 b:   (+ l humilis VOLNEY M. SPALDING @yz       T Salix     ^q UNITED STATES  ,*YX tristis  MALPIGHIALES l   W Michigan   S.N. ZB    "low specimens difficult to tell wheter it is s. tristis or s. humilis. the leaves may aid in the determination when they appear." ["(too juvenile for certainty)" crb57] 4n     0 SALICACEAE
{"catalogNumber": "1316819", "order": "Malpighiales", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Salix", "subgenus": "", "specificEpithet": "humilis", "verbatimTaxonRank": "", "infraspecificEpithet": "tristis", "identifiedBy": "", "recordedBy": "Volney M. Spalding", "recordNumber": "s.n.", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "\"Low specimens difficult to tell whether it is S. tristis or S. humilis. The leaves may aid in the determination when they appear.\" [\"(too juvenile for certainty)\" CRB57]", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}