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": ""}
1950-06-28 @               -105.27 a+91r   `58 mexico  GENTLE W-FACING SLOPES OF BROAD ARROYO, TRIBUTARY TO RÃ­O, OPEN GRASSLAND5 WITH PATCHES OF OAK-PINE WOODLAND P6Z  Astrgalus ervoides var. maysillesiid >j$%   23.8542 R[      rancho san pedro; 5 mi n of railroad at coyotes, 45 airline mi w of durango QH  var. Jb2sh  
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Astragalus ervoides var. maysillesii", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "var.", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1950-06-28", "habitat": "Gentle W-facing slopes of broad arroyo, tributary to r\u00c3\u00ado, open grasslands with patches of oak-pine woodland", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "", "county": "", "municipality": "", "locality": "Rancho San Pedro; 5 mi N of railroad at Coyotes, 45 airline mi W of Durango", "decimalLatitude": "23.8542", "decimalLongitude": "-105.27", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}