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": ""}
 Y  3100     ~ 1557972     durango p  humilis T    3000 /,   DURANGO .+     A CALLIANDRA    /3c 1950-07-10  nq MEXICO     e! James H. Maysilles    EAST SLOPES OF CERRO PRIETO (ABUT 20 AIRLINE MILES WEST OF OTINAPA) 
{"catalogNumber": "1557972", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Calliandra", "subgenus": "", "specificEpithet": "humilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "James H. Maysilles", "recordNumber": "", "verbatimEventDate": "1950-07-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Durango", "county": "Durango", "municipality": "", "locality": "East slopes of Cerro Prieto (about 20 airline miles west of Otinapa)", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "3000", "maximumElevationInMeters": "3100"}