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": ""}
    r  HOUSTON     Jn ? rhynchospora pusilla   v ROBERT KRAL     ZGWmL Chapm. ex Ml.A. Curtis  1972-06-05 xIT  RHYNCHOSPORA |9  POALES m8LB      >N CYPERACEAE   u_Mi PUSILLA   v Alabama   47255 iwY M 
{"catalogNumber": "", "order": "Poales", "family": "Cyperaceae", "scientificName": "Rhynchospora pusilla", "scientificNameAuthorship": "Chapm. ex M.A. Curtis", "genus": "Rhynchospora", "subgenus": "", "specificEpithet": "pusilla", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Robert Kral", "recordNumber": "47255", "verbatimEventDate": "1972-06-05", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Alabama", "county": "Houston", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}