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": ""}
contMact um herbarium  x     277 VlVB   FABALES  P       g s. white  -109.116 At     0 P VACHELLIA  Vachellia campechiana ^5W[   (MILL.) SEIGLER & EBINGER M      O:= 1939-09-07   @E Fabaceae  
{"catalogNumber": "", "order": "Fabales", "family": "Fabaceae", "scientificName": "Vachellia campechiana", "scientificNameAuthorship": "(Mill.) Seigler & Ebinger", "genus": "Vachellia", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "S. White", "recordNumber": "2767", "verbatimEventDate": "1939-09-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "-109.116", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}