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": ""}
L. B[R4    : Asclepias   edward g. voss v9  WALTON. Vz  R.R. Dreisbach Iik     1934-07-15 4(r o   hqZo asclepias tuberosa   ^)A tuberosa    gentianales adz=    , T APOCYNACEAE     .I+jt grand traverse   $ MICHIGAN  ~ak_0 OPEN SANDY THICKETS.
{"catalogNumber": "", "order": "Gentianales", "family": "Apocynaceae", "scientificName": "Asclepias tuberosa", "scientificNameAuthorship": "L.", "genus": "Asclepias", "subgenus": "", "specificEpithet": "tuberosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "R.R. Dreisbach", "recordNumber": "", "verbatimEventDate": "1934-07-15", "habitat": "Open sandy thickets.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Grand Traverse", "municipality": "", "locality": "Walton.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}