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": ""}
  1939-07-28 &b_S        Db r.b. shaw Poaceae d;D/  gracilis 8?8q     -0 27.1303  =+ eriochloa gracilis  Q Chihuahua      Do %M -104.917     hV(a leroy h. harvey  MEXICO p+,? 
{"catalogNumber": "", "order": "", "family": "Poaceae", "scientificName": "Eriochloa gracilis", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "gracilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "R.B. Shaw", "recordedBy": "LeRoy H. Harvey", "recordNumber": "", "verbatimEventDate": "1939-07-28", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Chihuahua", "county": "", "municipality": "", "locality": "", "decimalLatitude": "27.1303", "decimalLongitude": "-104.917", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}