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": ""}
   Ef 1973-06-10  QL -97.756  b. hansen & j. hansen =dT/  MEXICO ,F)  FABACEAE 5@7 z     BENTH.  n  1781 _  4      2 PASTURE AND REMNANTS OF WOODS ON HILLS     PN8%7# fabales leucaena     pulverulenta , -Za     ZjC  tantima 
{"catalogNumber": "", "order": "Fabales", "family": "Fabaceae", "scientificName": "", "scientificNameAuthorship": "Benth.", "genus": "Leucaena", "subgenus": "", "specificEpithet": "pulverulenta", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "B. Hansen & J. Hansen", "recordNumber": "1781", "verbatimEventDate": "1973-06-10", "habitat": "Pasture and remnants of woods on hills", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "", "county": "Tantima", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-97.756", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}