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": ""}
 E s.n.  k:  United States Polygonum K |i    6@+ L.  : BRANSON A. WALPOLE  % Caryophyllales     xSM WASHTENAW aviculare       =jU D.U.R. TRACKS WEST OF YPSILANTI.  +3 C^ Michigan   LcSj 1918-07-28   1466072 &+/  POLYGONUM AVICULARE y;ncn   POLYGONACEAE ^m     
{"catalogNumber": "1466072", "order": "Caryophyllales", "family": "Polygonaceae", "scientificName": "Polygonum aviculare", "scientificNameAuthorship": "L.", "genus": "Polygonum", "subgenus": "", "specificEpithet": "aviculare", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Branson A. Walpole", "recordNumber": "s.n.", "verbatimEventDate": "1918-07-28", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Washtenaw", "municipality": "", "locality": "D.U.R. Tracks west of Ypsilanti.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}