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 43.4096 1892-06-03 =  United States QR+S$   =P,/b a. a. reznicek   1556576 )f_:   h asterales  r GRATIOT   ROADSIDE 4m+Yf  s. n.  ]B   v^)7 St. Louis  RG -84.6087 no. 48 0      !q millefolium   ..W  Achillea millefolium L. M   `asteraceae l  N   ACHILLEA ze]D  
{"catalogNumber": "1556576", "order": "Asterales", "family": "Asteraceae", "scientificName": "Achillea millefolium", "scientificNameAuthorship": "L.", "genus": "Achillea", "subgenus": "", "specificEpithet": "millefolium", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "A. A. Reznicek", "recordedBy": "", "recordNumber": "s. n.", "verbatimEventDate": "1892-06-03", "habitat": "Roadside", "occurrenceRemarks": "No. 48", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Gratiot", "municipality": "", "locality": "St. Louis", "decimalLatitude": "43.4096", "decimalLongitude": "-84.6087", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}