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": ""}
     marshall ZI s   +|s_  Muskegon River Basin.   M8 SALICACEAE -86.097232 &RRi;  581 xPSYy          t0i  Michigan      i NIGRA      DX6  "7' tall shrub" [perhaps not pure]
{"catalogNumber": "", "order": "", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "Marshall", "genus": "", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "581", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "\"7' tall shrub\" [perhaps not pure]", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "Muskegon River Basin.", "decimalLatitude": "", "decimalLongitude": "-86.097232", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}