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": ""}
 PKA7 1983-08-18   "PROSTRATE PLANT, SILVERY APPEARANCE CAUSED BY SCARIOUS SHEATHS. ABUNDANT." Z   46.64471  Gxc   4540 U*I    m ford forestry center, 4 mi. n. of m-28 on us-41. Polygonum aviculare 7 [q^   Michigan E2]L    J^ HZ CARYOPHYLLALES       1466042 I  Ruh B. (Alford) MacFarlane -  POLYGONM W1d  HARD, DRY, GRAVELLY SOIL, EDGE OF ROAD & MOWED AREA. )ff   .ght United States  
{"catalogNumber": "1466042", "order": "Caryophyllales", "family": "", "scientificName": "Polygonum aviculare", "scientificNameAuthorship": "", "genus": "Polygonum", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Ruth B. (Alford) MacFarlane", "recordNumber": "4540", "verbatimEventDate": "1983-08-18", "habitat": "Hard, dry, gravelly soil, edge of road & mowed area.", "occurrenceRemarks": "\"Prostrate plant, silvery appearance caused by scarious sheaths. Abundant.\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "Ford Forestry Center, 4 mi. N. of M-28 on US-41.", "decimalLatitude": "46.64471", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}