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. y       1411619 `838       ECHINOCHLOA Q    MURICATA gl AS     c(B. BEAUV.) FERNALD  echinochloa muricata P$G    UNTED STATES nT   Q 1915-08-18  u  contact um herbarium  john davis SlAX+ 
{"catalogNumber": "1411619", "order": "", "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": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}