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": ""}
   x~ canada   R.S.W. Bobbette )x W  1315539 G    &~ 1992  D^Lx  fluviatilis         tk z6 CRATAEGUS FLUVIATILIS    ) . sarg. simcoe ~-or~   contact um herbarium `XY4.   79 197]2-05-31 Crataegus i  jl   g?uxm Rosales 
{"catalogNumber": "1315539", "order": "Rosales", "family": "", "scientificName": "Crataegus fluviatilis", "scientificNameAuthorship": "Sarg.", "genus": "Crataegus", "subgenus": "", "specificEpithet": "fluviatilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "R.S.W. Bobbette", "recordNumber": "1992", "verbatimEventDate": "1972-05-31", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "", "county": "Simcoe", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}