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": ""}
  w MERREMIA UMBELLATA    38u F. VENTURA A.       EYJdV 1970-11-09 GORDON D. MCPHERSON w9ud  2804 $,#7$       T]  umbellata       Convolvulaceae Fa8l  veracruz QB   (l.) hallier f. M;S 
{"catalogNumber": "", "order": "", "family": "Convolvulaceae", "scientificName": "Merremia umbellata", "scientificNameAuthorship": "(L.) Hallier f.", "genus": "", "subgenus": "", "specificEpithet": "umbellata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Gordon D. McPherson", "recordedBy": "F. Ventura A.", "recordNumber": "2804", "verbatimEventDate": "1970-11-09", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Veracruz", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}