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": ""}
    U ACR NEGUNDO SUBS. MEXICANUM      distrito federal :@  negundo  QEn2    ,f9pT 21967  mexicanum 2A]       SAPINDACEAE t$gv    BVOSQUE DE ABIES uc a]  Spindales 2Rmp    (DC.) Wesm. <)y , 
{"catalogNumber": "", "order": "Sapindales", "family": "Sapindaceae", "scientificName": "Acer negundo subsp. mexicanum", "scientificNameAuthorship": "(DC.) Wesm.", "genus": "", "subgenus": "", "specificEpithet": "negundo", "verbatimTaxonRank": "", "infraspecificEpithet": "mexicanum", "identifiedBy": "", "recordedBy": "", "recordNumber": "21967", "verbatimEventDate": "", "habitat": "bosque de Abies", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Distrito Federal", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}