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": ""}
Xanthium i e     H?VY  midland 1258321 ]:r^   XANTHIUM STRUMARIUM VAR. CANADENSE V<x       canadense u,W%k    ASTERACEAE e?s     R.R. Dreisbach ]   Mf4z 1931-09-07     43.57673 @6)&   
{"catalogNumber": "1258321", "order": "", "family": "Asteraceae", "scientificName": "Xanthium strumarium var. canadense", "scientificNameAuthorship": "", "genus": "Xanthium", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "canadense", "identifiedBy": "", "recordedBy": "R.R. Dreisbach", "recordNumber": "", "verbatimEventDate": "1931-09-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Midland", "municipality": "", "locality": "", "decimalLatitude": "43.57673", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}