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": ""}
    F9k Tamaulipas       1BF+ El Chapote; 23 mi from the San Fernando-Matamoros hwy jct on the gravel road to Reynosa      Y /Fx 4714A    o eragrostis silveana  BRUSH ALONG SMALL ARROYO  [1    j 122    silveana #w    @t o 1121729
{"catalogNumber": "1121729", "order": "", "family": "", "scientificName": "Eragrostis silveana", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "silveana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "4714A", "verbatimEventDate": "", "habitat": "Brush along small arroyo", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Tamaulipas", "county": "", "municipality": "", "locality": "El Chapote; 23 mi from the San Fernando-Matamoros hwy jct on the gravel road to Reynosa", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "122", "maximumElevationInMeters": ""}