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": ""}
     b_r Leonurus sibiricus  dV 29291   1520917 S      WALTER N. KOELZ  x     a lamiales     fm INDIA  +> lamiacea3   9e[jA L. Kamrup j0*Q   M4- RANGIYA  4q  SIBIRICUS  ~zr ASSAM 
{"catalogNumber": "1520917", "order": "Lamiales", "family": "Lamiaceae", "scientificName": "Leonurus sibiricus", "scientificNameAuthorship": "L.", "genus": "", "subgenus": "", "specificEpithet": "sibiricus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Walter N. Koelz", "recordNumber": "29291", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "Assam", "county": "Kamrup", "municipality": "", "locality": "Rangiya", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}