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": ""}
 M3 -U 5900       @m MEXICO  m. johnston & j. crutchfield r   Benth. %`R.V        croton ^        etuY  MONOECIOUS MUCH-BRANCHED SHRUBS TO 3 FT. TALL, THE COMMONEST CROTONS IN THIS AREA Michoacan zObT    OhRNO DATA 
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "Benth.", "genus": "Croton", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "M. Johnston & J. Crutchfield", "recordNumber": "5900", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "monoecious much-branched shrubs to 3 ft. tall, the commonest Crotons in this area", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Michoacan", "county": "no data", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}