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": ""}
   margaretta e~4AY  Michigan U=   x "PETALS WHITE; STAMENS PALE TAN (SHRIVELED AT COLLECTION TIME); SHRUB 2.5 M TALL"  wUHy -84.66602 peter w. fritsch 0 G.   jonesville, old tracks, n. side us-12. BZ#  ashe     XKi4 UNITED STATES   <dx)_ 1989-05-27  x `  41.98271   9|  LOCAL ALONG ROADSIDE.     CRATAEGUS  ,r`l, hillsdale 997 Hp  1465841 >`J `     Rq: rosaceae  ROSALES K0  Crataegus margaretta q)q 
{"catalogNumber": "1465841", "order": "Rosales", "family": "Rosaceae", "scientificName": "Crataegus margaretta", "scientificNameAuthorship": "Ashe", "genus": "Crataegus", "subgenus": "", "specificEpithet": "margaretta", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Peter W. Fritsch", "recordNumber": "997", "verbatimEventDate": "1989-05-27", "habitat": "Local along roadside.", "occurrenceRemarks": "\"Petals white; stamens pale tan (shriveled at collection time); shrub 2.5 m tall\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Hillsdale", "municipality": "", "locality": "Jonesville, old tracks, N. side US-12.", "decimalLatitude": "41.98271", "decimalLongitude": "-84.66602", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}