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": ""}
  1993-11-08 X     lp 18829      CVh tristachya     j. calzada & l. rico a. R.  d   KUC j tristachya avenacea  J. SÃ¡NCHEZ-KEN      contact um herbarium 4 O   scribn. & merr. =2,2    
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Tristachya avenacea", "scientificNameAuthorship": "Scribn. & Merr.", "genus": "Tristachya", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "J. S\u00c3\u00a1nchez-Ken", "recordedBy": "J. Calzada & L. Rico A.", "recordNumber": "18829", "verbatimEventDate": "1993-11-08", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}