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": ""}
  @00+ (L.) Richter        "APPROXIMATELY 1500 PLANTS" Oew    2xG ] Poaceae   J75dl SPICATUM   1247564 5-yQi  -87.b45708  R       f p  Marquette  UNITED STATES ?2    46.63854 ? 
{"catalogNumber": "1247564", "order": "", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "(L.) Richter", "genus": "", "subgenus": "", "specificEpithet": "spicatum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "\"Approximately 100 plants\"", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Marquette", "municipality": "", "locality": "", "decimalLatitude": "46.63854", "decimalLongitude": "-87.45708", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}