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": ""}
 !~ec Greene  R ASTERACEAE    643  $m?,          heBV michigan   ch howellii     2006-06-19 wS@?.  Antennaria howellii 0 f    Ian 5hackleford O  edward g. voss Q|i_  ANTENNARIA /$?fl 
{"catalogNumber": "", "order": "", "family": "Asteraceae", "scientificName": "Antennaria howellii", "scientificNameAuthorship": "Greene", "genus": "Antennaria", "subgenus": "", "specificEpithet": "howellii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "Ian Shackleford", "recordNumber": "643", "verbatimEventDate": "2006-06-19", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}