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. Bs (     n ) United States  B1of 1915-08-18 CONTACT VM HERBARIUM ,   U echinochloa muricata    L) ` (P. Beauv.) Fernald JOHN DAVIS CuXu5        ECHINOCHLOA  `M~X   4u missUouri muricata RP5      POALES A   1411619 r   
{"catalogNumber": "1411619", "order": "Poales", "family": "", "scientificName": "Echinochloa muricata", "scientificNameAuthorship": "(P. Beauv.) Fernald", "genus": "Echinochloa", "subgenus": "", "specificEpithet": "muricata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John Davis", "recordNumber": "s.n.", "verbatimEventDate": "1915-08-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Missouri", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}