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": ""}
united states L/I     ~y ASTERACEAE  philadelphicus G  HOUGHTON Eycm   G- 2 1972 charles d. richarJds r  Erigeron philadelphicus :  Meadow H    =~%Wj Asterales         1949-06-16       Y &=Ou at public boat landing. sturgeon slough. 
{"catalogNumber": "", "order": "Asterales", "family": "Asteraceae", "scientificName": "Erigeron philadelphicus", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "philadelphicus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Charles D. Richards", "recordNumber": "1972", "verbatimEventDate": "1949-06-16", "habitat": "Meadow", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Houghton", "municipality": "", "locality": "at public boat landing. Sturgeon Slough.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}