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": ""}
 s.n. 2S      :V  Boston    RAO suffolk   3_ Gentiana serrata Gentianaceae Lj  serrata RFwcq     MUdU GRPM 40246 Lam. yU     XSc MRS. HOUGHTON   V 1891-09-15  gentiana l  Gentianales USHG    1521177 0D  Massachusetts P 
{"catalogNumber": "1521177", "order": "Gentianales", "family": "Gentianaceae", "scientificName": "Gentiana serrata", "scientificNameAuthorship": "Lam.", "genus": "Gentiana", "subgenus": "", "specificEpithet": "serrata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Mrs. Houghton", "recordNumber": "s.n.", "verbatimEventDate": "1891-09-15", "habitat": "", "occurrenceRemarks": "GRPM 40246", "associatedTaxa": "", "country": "", "stateProvince": "Massachusetts", "county": "Suffolk", "municipality": "", "locality": "Boston", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}