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": ""}
          V. W. Steinmann U     MICHOACAN: MUNICIPIO DE ARTEAGA ALONG MEX 37, CA. 75 KM (BY ROAD) NORTH OF ARTEAGA AND 1 KM SOUTH OF EL DESCANSADERO `   O<&3 ARTEAGA Michoacan Rf      shallow ravine on the rocky hillside above the highway; open thorn forest @      1668018 ;!5) 
{"catalogNumber": "1668018", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "V. W. Steinmann", "recordNumber": "", "verbatimEventDate": "", "habitat": "Shallow ravine on the rocky hillside above the highway; open thorn forest", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michoacan", "county": "Arteaga", "municipality": "", "locality": "Michoacan: municipio de Arteaga, along MEX 37, ca. 75 km (by road) north of Arteaga and 1 km south of El Descansadero", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}